[PATCH v2 00/19] ARM: platform and feature deprecation

[PATCH v2 00/19] ARM: platform and feature deprecation

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Sorry for dropping the ball on v1 of this series almost two years ago.
This is attempt to bring the source code to the state that we discussed
back in 2024, regarding a timeline for deprecating and removing features,
in particular platforms and ABIs that are basically unused and are
also getting in the way of maintenance.

The earlier consensus was to remove these features in 2025 or 2026
after the corresponding LTS kernel release. I would suggest pushing
these to early 2027 now, see the patch description for details on
each one:

 - all board files that are still not converted to DT
   (except for OMAP1 and S3C)

 - iWMMXt FPU support

 - ARMv6/ARM1136r0 (not ARMv6K/ARM1136r1/ARM1176) along with the
   OMAP24xx and i.MX31 SoCs using it

 - Cortex-M3/M4/M7 based microcontroller support
   (stm32, imxrt, lpc18xx, samv7)

 - LSI Axxia platform

 - OABI, OABI-compat and NWFPE are confined to StrongARM based
   builds and scheduled for removal once StrongARM is gone.

 - DEPRECATED_PARAM_STRUCT, which was originally scheduled for
   removal in 2006 (!)

The ARCH_S3C64XX platform was scheduled for removal in 2024, but is
still actively used and will get removed once Mark Brown stops using
it. The OMAP1 platform has some remaining boardfiles and is expected to
get converted to DT.

Big-endian ARMv7 CPU support is not scheduled for removal but marked
as broken the same way as ARM64 has, to reduce the need for testing
unused configurations. This may be removed in the future if arm64 does
it as well (note: big-endian ARMv5 support is not deprecated because
it is used by ixp4xx).

Regarding actually removing the code, I would suggest linux-7.4 (January
2027), removing both the board files and any drivers that have either
become newly unused or were missed in a previous machine removal series,
followed by removing support for then unused CPUs a release later.

Maintainers of the above features, please provide Acks or let me know
if you think any of them need to hand around for longer.

Changes since v1:

  - fix build failures for ARMv6 patch
  - update timelines
  - add a few more patches for features that were not
    quite as obsolete two years ago

Links to previous discussion:

  https://lore.kernel.org/linux-arm-kernel/20210109174357.GB1551@shell.armlinux.org.uk/
  https://lore.kernel.org/linux-arm-kernel/2831c5a6-cfbf-4fe0-b51c-0396e5b0aeb7@app.fastmail.com/
  https://lore.kernel.org/all/20241204102904.1863796-1-arnd@kernel.org/

Arnd Bergmann (19):
  ARM: use CONFIG_AEABI by default everywhere
  ARM: limit OABI support to StrongARM CPUs
  ARM: rework ARM11 CPU selection logic
  ARM: deprecate support for ARM1136r0
  ARM: turn CONFIG_ATAGS off by default
  ARM: mark CPU_ENDIAN_BE8 as deprecated
  ARM: update DEPRECATED_PARAM_STRUCT removal timeline
  ARM: s3c64xx: extend deprecation schedule
  ARM: update FPE_NWFPE help text
  ARM: mark IWMMXT as deprecated
  ARM: mark ARCH_DOVE as deprecated
  ARM: PXA: mark remaining board files as deprecated
  ARM: orion5x: mark all board files as deprecated
  ARM: mark mach-sa1100 as deprecated
  ARM: mark RiscPC as deprecated
  ARM: mark footbridge as deprecated
  ARM: mark Cortex-M3/M4/M7 based boards as deprecated
  ARM: mark axxia platform as deprecated
  ARM: mark mv78xx0 support as deprecated

 arch/arm/Kconfig                        | 80 ++++++++++++++-----------
 arch/arm/Kconfig.platforms              |  2 +-
 arch/arm/configs/am200epdkit_defconfig  |  3 +-
 arch/arm/configs/aspeed_g4_defconfig    |  2 -
 arch/arm/configs/aspeed_g5_defconfig    |  1 -
 arch/arm/configs/assabet_defconfig      |  3 +
 arch/arm/configs/at91_dt_defconfig      |  2 -
 arch/arm/configs/axm55xx_defconfig      |  2 -
 arch/arm/configs/bcm2835_defconfig      |  1 -
 arch/arm/configs/clps711x_defconfig     |  1 -
 arch/arm/configs/collie_defconfig       |  2 +-
 arch/arm/configs/davinci_all_defconfig  |  1 -
 arch/arm/configs/dove_defconfig         |  2 +-
 arch/arm/configs/ep93xx_defconfig       |  1 -
 arch/arm/configs/footbridge_defconfig   |  2 +
 arch/arm/configs/gemini_defconfig       |  1 -
 arch/arm/configs/h3600_defconfig        |  3 +-
 arch/arm/configs/hisi_defconfig         |  1 -
 arch/arm/configs/imx_v4_v5_defconfig    |  1 -
 arch/arm/configs/integrator_defconfig   |  2 -
 arch/arm/configs/ixp4xx_defconfig       |  1 -
 arch/arm/configs/jornada720_defconfig   |  3 +-
 arch/arm/configs/keystone_defconfig     |  1 -
 arch/arm/configs/lpc32xx_defconfig      |  1 -
 arch/arm/configs/mmp2_defconfig         |  1 -
 arch/arm/configs/moxart_defconfig       |  2 -
 arch/arm/configs/mps2_defconfig         |  1 -
 arch/arm/configs/multi_v4t_defconfig    |  2 -
 arch/arm/configs/multi_v5_defconfig     | 10 ----
 arch/arm/configs/mv78xx0_defconfig      |  3 +-
 arch/arm/configs/mvebu_v5_defconfig     | 10 ----
 arch/arm/configs/mxs_defconfig          |  1 -
 arch/arm/configs/neponset_defconfig     |  3 +
 arch/arm/configs/netwinder_defconfig    |  3 +
 arch/arm/configs/nhk8815_defconfig      |  1 -
 arch/arm/configs/omap1_defconfig        |  3 +-
 arch/arm/configs/orion5x_defconfig      | 11 ----
 arch/arm/configs/pxa168_defconfig       |  2 -
 arch/arm/configs/pxa3xx_defconfig       |  2 -
 arch/arm/configs/pxa910_defconfig       |  2 -
 arch/arm/configs/pxa_defconfig          |  5 --
 arch/arm/configs/rpc_defconfig          |  3 +
 arch/arm/configs/s3c6400_defconfig      |  2 +
 arch/arm/configs/sama5_defconfig        |  1 -
 arch/arm/configs/sama7_defconfig        |  1 -
 arch/arm/configs/spear13xx_defconfig    |  1 -
 arch/arm/configs/spitz_defconfig        |  2 +-
 arch/arm/configs/stm32_defconfig        |  3 +-
 arch/arm/configs/versatile_defconfig    |  2 -
 arch/arm/configs/vt8500_v6_v7_defconfig |  1 -
 arch/arm/configs/wpcm450_defconfig      |  2 -
 arch/arm/mach-at91/Kconfig              |  4 +-
 arch/arm/mach-axxia/Kconfig             |  4 +-
 arch/arm/mach-dove/Kconfig              |  8 ++-
 arch/arm/mach-footbridge/Kconfig        |  7 ++-
 arch/arm/mach-imx/Kconfig               | 13 +++-
 arch/arm/mach-mv78xx0/Kconfig           |  4 +-
 arch/arm/mach-omap2/Kconfig             | 18 ++++--
 arch/arm/mach-orion5x/Kconfig           | 47 +++++++++++----
 arch/arm/mach-pxa/Kconfig               | 10 +++-
 arch/arm/mach-rpc/Kconfig               |  5 +-
 arch/arm/mach-s3c/Kconfig.s3c64xx       | 15 +++--
 arch/arm/mach-sa1100/Kconfig            |  5 +-
 arch/arm/mach-stm32/Kconfig             | 14 +++--
 arch/arm/mach-versatile/Kconfig         | 15 +++--
 arch/arm/mm/Kconfig                     | 29 ++++++++-
 66 files changed, 227 insertions(+), 170 deletions(-)

-- 
2.39.5

Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Cc: Daniel Mack <daniel@zonque.org>
Cc: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Cc: Frank Li <Frank.Li@nxp.com>
Cc: Gregory Clement <gregory.clement@bootlin.com>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: "Jeremy J. Peper" <jeremy@jeremypeper.com>
Cc: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Linus Walleij <linusw@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Ralph Siemsen <ralph.siemsen@linaro.org>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Stefan Wiehler <stefan.wiehler@nokia.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org

[PATCH v2 01/19] ARM: use CONFIG_AEABI by default everywhere

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

On ARMv4 and ARMv5, the default is still to build for OABI, with
CONFIG_AEABI disabled, even though distros and toolchains no longer
support OABI as a target.

Change the default to EABI for all architecture levels and change
the defconfig entries as follows:

 - All machines that used to explicitly enable EABI can drop that line now
 - Machines that are likely to actually use old distros and had NWFPE
   enabled in combination with OABI (rpc, footrbridge, netwinder,
   assabet, neponset) explicitly turn it on now.
 - Machines that already had both EABI and NWFPE disabled in defconfig
   (at91_dt, collie, ep93xx, gemini, h3600, imx_v4_v5, integrator, jornada,
   moxart, multi_v4t, omap1) were likely not usable with either OABI or
   EABI and now use EABI instead implicitly, making it more likely that
   they could work.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig                        | 15 ++++++---------
 arch/arm/configs/am200epdkit_defconfig  |  1 -
 arch/arm/configs/aspeed_g4_defconfig    |  1 -
 arch/arm/configs/assabet_defconfig      |  1 +
 arch/arm/configs/at91_dt_defconfig      |  1 -
 arch/arm/configs/axm55xx_defconfig      |  1 -
 arch/arm/configs/bcm2835_defconfig      |  1 -
 arch/arm/configs/clps711x_defconfig     |  1 -
 arch/arm/configs/collie_defconfig       |  1 -
 arch/arm/configs/davinci_all_defconfig  |  1 -
 arch/arm/configs/dove_defconfig         |  1 -
 arch/arm/configs/ep93xx_defconfig       |  1 -
 arch/arm/configs/footbridge_defconfig   |  1 +
 arch/arm/configs/gemini_defconfig       |  1 -
 arch/arm/configs/h3600_defconfig        |  1 -
 arch/arm/configs/hisi_defconfig         |  1 -
 arch/arm/configs/imx_v4_v5_defconfig    |  1 -
 arch/arm/configs/integrator_defconfig   |  1 -
 arch/arm/configs/ixp4xx_defconfig       |  1 -
 arch/arm/configs/jornada720_defconfig   |  1 -
 arch/arm/configs/keystone_defconfig     |  1 -
 arch/arm/configs/lpc32xx_defconfig      |  1 -
 arch/arm/configs/mmp2_defconfig         |  1 -
 arch/arm/configs/moxart_defconfig       |  1 -
 arch/arm/configs/multi_v4t_defconfig    |  1 -
 arch/arm/configs/multi_v5_defconfig     |  1 -
 arch/arm/configs/mv78xx0_defconfig      |  2 --
 arch/arm/configs/mvebu_v5_defconfig     |  1 -
 arch/arm/configs/mxs_defconfig          |  1 -
 arch/arm/configs/neponset_defconfig     |  1 +
 arch/arm/configs/netwinder_defconfig    |  1 +
 arch/arm/configs/nhk8815_defconfig      |  1 -
 arch/arm/configs/omap1_defconfig        |  2 --
 arch/arm/configs/orion5x_defconfig      |  2 --
 arch/arm/configs/pxa168_defconfig       |  2 --
 arch/arm/configs/pxa3xx_defconfig       |  2 --
 arch/arm/configs/pxa910_defconfig       |  2 --
 arch/arm/configs/pxa_defconfig          |  1 -
 arch/arm/configs/rpc_defconfig          |  1 +
 arch/arm/configs/spear13xx_defconfig    |  1 -
 arch/arm/configs/spitz_defconfig        |  1 -
 arch/arm/configs/versatile_defconfig    |  1 -
 arch/arm/configs/vt8500_v6_v7_defconfig |  1 -
 arch/arm/configs/wpcm450_defconfig      |  1 -
 44 files changed, 11 insertions(+), 53 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9187240a02db..ccc0114d30de 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1153,17 +1153,14 @@ config ARM_PATCH_IDIV
 config AEABI
 	bool "Use the ARM EABI to compile the kernel" if !CPU_V7 && \
 		!CPU_V7M && !CPU_V6 && !CPU_V6K && !CC_IS_CLANG
-	default CPU_V7 || CPU_V7M || CPU_V6 || CPU_V6K || CC_IS_CLANG
+	default y
 	help
-	  This option allows for the kernel to be compiled using the latest
-	  ARM ABI (aka EABI).  This is only useful if you are using a user
-	  space environment that is also compiled with EABI.
+	  The Arm EABI is the default ABI on all modern Linux
+	  distributions, replacing the obsolete and "OABI" that was
+	  commonly used on ARMv4 distributions before ca. 2013.
 
-	  Since there are major incompatibilities between the legacy ABI and
-	  EABI, especially with regard to structure member alignment, this
-	  option also changes the kernel syscall calling convention to
-	  disambiguate both ABIs and allow for backward compatibility support
-	  (selected with CONFIG_OABI_COMPAT).
+	  Everyone should enable this, as support for OABI user space
+	  was dropped in gcc-4.8 and most distributions after ca. 2013.
 
 config OABI_COMPAT
 	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
diff --git a/arch/arm/configs/am200epdkit_defconfig b/arch/arm/configs/am200epdkit_defconfig
index d8198592fe1b..b3f81237c6e1 100644
--- a/arch/arm/configs/am200epdkit_defconfig
+++ b/arch/arm/configs/am200epdkit_defconfig
@@ -7,7 +7,6 @@ CONFIG_EXPERT=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_PXA=y
 CONFIG_ARCH_GUMSTIX=y
-CONFIG_AEABI=y
 # CONFIG_OABI_COMPAT is not set
 CONFIG_CMDLINE="console=ttyS0,115200n8 root=1f01 rootfstype=jffs2"
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/aspeed_g4_defconfig b/arch/arm/configs/aspeed_g4_defconfig
index 45d8738abb75..3dcb80157f77 100644
--- a/arch/arm/configs/aspeed_g4_defconfig
+++ b/arch/arm/configs/aspeed_g4_defconfig
@@ -22,7 +22,6 @@ CONFIG_KEXEC=y
 CONFIG_ARCH_ASPEED=y
 CONFIG_MACH_ASPEED_G4=y
 CONFIG_VMSPLIT_2G=y
-CONFIG_AEABI=y
 CONFIG_UACCESS_WITH_MEMCPY=y
 # CONFIG_ATAGS is not set
 CONFIG_JUMP_LABEL=y
diff --git a/arch/arm/configs/assabet_defconfig b/arch/arm/configs/assabet_defconfig
index 07ab9eaac4af..df63889b0c4c 100644
--- a/arch/arm/configs/assabet_defconfig
+++ b/arch/arm/configs/assabet_defconfig
@@ -5,6 +5,7 @@ CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_ASSABET=y
+# CONFIG_AEABI is not set
 CONFIG_CMDLINE="mem=32M console=ttySA0,38400n8 initrd=0xc0800000,3M root=/dev/ram"
 CONFIG_FPE_NWFPE=y
 CONFIG_PM=y
diff --git a/arch/arm/configs/at91_dt_defconfig b/arch/arm/configs/at91_dt_defconfig
index e331242dece7..320eb27a6a2e 100644
--- a/arch/arm/configs/at91_dt_defconfig
+++ b/arch/arm/configs/at91_dt_defconfig
@@ -18,7 +18,6 @@ CONFIG_SOC_AT91SAM9=y
 CONFIG_SOC_SAM9X60=y
 CONFIG_SOC_SAM9X7=y
 # CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
-CONFIG_AEABI=y
 CONFIG_UACCESS_WITH_MEMCPY=y
 # CONFIG_ATAGS is not set
 CONFIG_ARM_APPENDED_DTB=y
diff --git a/arch/arm/configs/axm55xx_defconfig b/arch/arm/configs/axm55xx_defconfig
index 0952e5e94c5e..12c59a4ee504 100644
--- a/arch/arm/configs/axm55xx_defconfig
+++ b/arch/arm/configs/axm55xx_defconfig
@@ -38,7 +38,6 @@ CONFIG_PCIE_AXXIA=y
 CONFIG_SMP=y
 CONFIG_NR_CPUS=16
 CONFIG_HOTPLUG_CPU=y
-CONFIG_AEABI=y
 CONFIG_OABI_COMPAT=y
 CONFIG_HIGHMEM=y
 CONFIG_ARM_APPENDED_DTB=y
diff --git a/arch/arm/configs/bcm2835_defconfig b/arch/arm/configs/bcm2835_defconfig
index 4a8ac09843d7..b469ecc36cf5 100644
--- a/arch/arm/configs/bcm2835_defconfig
+++ b/arch/arm/configs/bcm2835_defconfig
@@ -25,7 +25,6 @@ CONFIG_CRASH_DUMP=y
 CONFIG_ARCH_MULTI_V6=y
 CONFIG_ARCH_BCM=y
 CONFIG_ARCH_BCM2835=y
-CONFIG_AEABI=y
 CONFIG_SECCOMP=y
 CONFIG_KEXEC=y
 CONFIG_CPU_FREQ=y
diff --git a/arch/arm/configs/clps711x_defconfig b/arch/arm/configs/clps711x_defconfig
index f66d502ce2ef..7ba344e84c62 100644
--- a/arch/arm/configs/clps711x_defconfig
+++ b/arch/arm/configs/clps711x_defconfig
@@ -6,7 +6,6 @@ CONFIG_RD_LZMA=y
 CONFIG_EXPERT=y
 CONFIG_JUMP_LABEL=y
 CONFIG_PARTITION_ADVANCED=y
-CONFIG_AEABI=y
 # CONFIG_COREDUMP is not set
 CONFIG_SLUB_TINY=y
 CONFIG_NET=y
diff --git a/arch/arm/configs/collie_defconfig b/arch/arm/configs/collie_defconfig
index 578c6a4af620..165202960438 100644
--- a/arch/arm/configs/collie_defconfig
+++ b/arch/arm/configs/collie_defconfig
@@ -10,7 +10,6 @@ CONFIG_ARCH_MULTI_V4=y
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_COLLIE=y
 CONFIG_CMDLINE="noinitrd root=/dev/mtdblock2 rootfstype=jffs2 fbcon=rotate:1"
-CONFIG_FPE_NWFPE=y
 CONFIG_PM=y
 # CONFIG_SWAP is not set
 CONFIG_SLUB_TINY=y
diff --git a/arch/arm/configs/davinci_all_defconfig b/arch/arm/configs/davinci_all_defconfig
index 72703ef0c51c..e6fbe1f03920 100644
--- a/arch/arm/configs/davinci_all_defconfig
+++ b/arch/arm/configs/davinci_all_defconfig
@@ -17,7 +17,6 @@ CONFIG_ARCH_DAVINCI=y
 CONFIG_ARCH_DAVINCI_DA850=y
 CONFIG_DAVINCI_MUX_DEBUG=y
 CONFIG_DAVINCI_MUX_WARNINGS=y
-CONFIG_AEABI=y
 CONFIG_SECCOMP=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
diff --git a/arch/arm/configs/dove_defconfig b/arch/arm/configs/dove_defconfig
index b6ed01216a62..08271e6719d7 100644
--- a/arch/arm/configs/dove_defconfig
+++ b/arch/arm/configs/dove_defconfig
@@ -7,7 +7,6 @@ CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V7=y
 CONFIG_ARCH_DOVE=y
 CONFIG_MACH_CM_A510=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
diff --git a/arch/arm/configs/ep93xx_defconfig b/arch/arm/configs/ep93xx_defconfig
index ce41dc8c435c..6863d8fd7713 100644
--- a/arch/arm/configs/ep93xx_defconfig
+++ b/arch/arm/configs/ep93xx_defconfig
@@ -18,7 +18,6 @@ CONFIG_MACH_EDB9315=y
 CONFIG_MACH_EDB9315A=y
 CONFIG_MACH_TS72XX=y
 CONFIG_MACH_VISION_EP9307=y
-CONFIG_AEABI=y
 CONFIG_CMDLINE="console=ttyAM0,115200 root=/dev/nfs ip=bootp"
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
diff --git a/arch/arm/configs/footbridge_defconfig b/arch/arm/configs/footbridge_defconfig
index 5f6963687ee4..589b7b1df8c6 100644
--- a/arch/arm/configs/footbridge_defconfig
+++ b/arch/arm/configs/footbridge_defconfig
@@ -11,6 +11,7 @@ CONFIG_ARCH_EBSA285_HOST=y
 CONFIG_ARCH_NETWINDER=y
 CONFIG_FPE_NWFPE=y
 CONFIG_FPE_NWFPE_XP=y
+# CONFIG_AEABI is not set
 CONFIG_MODULES=y
 CONFIG_PARTITION_ADVANCED=y
 CONFIG_ACORN_PARTITION=y
diff --git a/arch/arm/configs/gemini_defconfig b/arch/arm/configs/gemini_defconfig
index 7b1daec630cb..5860b2fe7d1f 100644
--- a/arch/arm/configs/gemini_defconfig
+++ b/arch/arm/configs/gemini_defconfig
@@ -11,7 +11,6 @@ CONFIG_KEXEC=y
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_GEMINI=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_CMDLINE="console=ttyS0,115200n8"
 CONFIG_PM=y
diff --git a/arch/arm/configs/h3600_defconfig b/arch/arm/configs/h3600_defconfig
index 4e272875c797..0923d331190a 100644
--- a/arch/arm/configs/h3600_defconfig
+++ b/arch/arm/configs/h3600_defconfig
@@ -9,7 +9,6 @@ CONFIG_ARCH_MULTI_V4=y
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_H3600=y
 # CONFIG_CPU_FREQ_STAT is not set
-CONFIG_FPE_NWFPE=y
 CONFIG_MODULES=y
 CONFIG_NET=y
 CONFIG_UNIX=y
diff --git a/arch/arm/configs/hisi_defconfig b/arch/arm/configs/hisi_defconfig
index dde9cff951d4..c89b743784ca 100644
--- a/arch/arm/configs/hisi_defconfig
+++ b/arch/arm/configs/hisi_defconfig
@@ -10,7 +10,6 @@ CONFIG_ARCH_HIP04=y
 CONFIG_ARCH_HIX5HD2=y
 CONFIG_SMP=y
 CONFIG_NR_CPUS=16
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
diff --git a/arch/arm/configs/imx_v4_v5_defconfig b/arch/arm/configs/imx_v4_v5_defconfig
index 9139d1784c70..871e93dd65b5 100644
--- a/arch/arm/configs/imx_v4_v5_defconfig
+++ b/arch/arm/configs/imx_v4_v5_defconfig
@@ -15,7 +15,6 @@ CONFIG_ARCH_MXC=y
 CONFIG_SOC_IMX1=y
 CONFIG_SOC_IMX25=y
 CONFIG_SOC_IMX27=y
-CONFIG_AEABI=y
 CONFIG_PM_DEBUG=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/integrator_defconfig b/arch/arm/configs/integrator_defconfig
index 61711d4bbf74..ba38ec810a61 100644
--- a/arch/arm/configs/integrator_defconfig
+++ b/arch/arm/configs/integrator_defconfig
@@ -13,7 +13,6 @@ CONFIG_ARCH_INTEGRATOR=y
 CONFIG_ARCH_INTEGRATOR_AP=y
 CONFIG_INTEGRATOR_IMPD1=y
 CONFIG_ARCH_INTEGRATOR_CP=y
-CONFIG_AEABI=y
 # CONFIG_ATAGS is not set
 CONFIG_CMDLINE="console=ttyAM0,38400n8 root=/dev/nfs ip=bootp"
 CONFIG_CPU_FREQ=y
diff --git a/arch/arm/configs/ixp4xx_defconfig b/arch/arm/configs/ixp4xx_defconfig
index 418ef909572b..122ca7354986 100644
--- a/arch/arm/configs/ixp4xx_defconfig
+++ b/arch/arm/configs/ixp4xx_defconfig
@@ -9,7 +9,6 @@ CONFIG_EXPERT=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_IXP4XX=y
 CONFIG_CPU_BIG_ENDIAN=y
-CONFIG_AEABI=y
 CONFIG_CMDLINE="console=ttyS0,115200"
 CONFIG_STRICT_KERNEL_RWX=y
 CONFIG_STRICT_MODULE_RWX=y
diff --git a/arch/arm/configs/jornada720_defconfig b/arch/arm/configs/jornada720_defconfig
index d57285cfefb2..0ebddd083b36 100644
--- a/arch/arm/configs/jornada720_defconfig
+++ b/arch/arm/configs/jornada720_defconfig
@@ -5,7 +5,6 @@ CONFIG_ARCH_MULTI_V4=y
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_JORNADA720=y
 CONFIG_SA1100_JORNADA720_SSP=y
-CONFIG_FPE_NWFPE=y
 CONFIG_PM=y
 CONFIG_MODULES=y
 CONFIG_NET=y
diff --git a/arch/arm/configs/keystone_defconfig b/arch/arm/configs/keystone_defconfig
index b0cadd878152..af91b9a420c9 100644
--- a/arch/arm/configs/keystone_defconfig
+++ b/arch/arm/configs/keystone_defconfig
@@ -22,7 +22,6 @@ CONFIG_PCI_KEYSTONE=y
 CONFIG_SMP=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_ARM_PSCI=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_VFP=y
 CONFIG_NEON=y
diff --git a/arch/arm/configs/lpc32xx_defconfig b/arch/arm/configs/lpc32xx_defconfig
index b9e2e603cd95..c0b45eea1b0f 100644
--- a/arch/arm/configs/lpc32xx_defconfig
+++ b/arch/arm/configs/lpc32xx_defconfig
@@ -10,7 +10,6 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_EXPERT=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_LPC32XX=y
-CONFIG_AEABI=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_CMDLINE="console=ttyS0,115200n81 root=/dev/ram0"
diff --git a/arch/arm/configs/mmp2_defconfig b/arch/arm/configs/mmp2_defconfig
index 0ea608c75f22..2ca166d4e78f 100644
--- a/arch/arm/configs/mmp2_defconfig
+++ b/arch/arm/configs/mmp2_defconfig
@@ -4,7 +4,6 @@ CONFIG_PREEMPT=y
 CONFIG_LOG_BUF_SHIFT=14
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_ARCH_MMP=y
-CONFIG_AEABI=y
 CONFIG_MACH_MMP2_DT=y
 CONFIG_CMDLINE="root=/dev/nfs rootfstype=nfs nfsroot=192.168.1.100:/nfsroot/ ip=192.168.1.101:192.168.1.100::255.255.255.0::eth0:on console=ttyS2,38400 mem=128M user_debug=255 earlyprintk"
 CONFIG_VFP=y
diff --git a/arch/arm/configs/moxart_defconfig b/arch/arm/configs/moxart_defconfig
index e2d9f3610063..d97d9ea5c34d 100644
--- a/arch/arm/configs/moxart_defconfig
+++ b/arch/arm/configs/moxart_defconfig
@@ -16,7 +16,6 @@ CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_MOXART=y
 CONFIG_MACH_UC7112LX=y
-CONFIG_AEABI=y
 # CONFIG_ATAGS is not set
 CONFIG_ARM_APPENDED_DTB=y
 # CONFIG_SWAP is not set
diff --git a/arch/arm/configs/multi_v4t_defconfig b/arch/arm/configs/multi_v4t_defconfig
index 1a86dc305523..14c93bb59ad6 100644
--- a/arch/arm/configs/multi_v4t_defconfig
+++ b/arch/arm/configs/multi_v4t_defconfig
@@ -17,7 +17,6 @@ CONFIG_INTEGRATOR_IMPD1=y
 CONFIG_INTEGRATOR_CM720T=y
 CONFIG_INTEGRATOR_CM920T=y
 CONFIG_INTEGRATOR_CM922T_XA10=y
-CONFIG_AEABI=y
 # CONFIG_ATAGS is not set
 CONFIG_CPU_IDLE=y
 CONFIG_ARM_CPUIDLE=y
diff --git a/arch/arm/configs/multi_v5_defconfig b/arch/arm/configs/multi_v5_defconfig
index d237ea8ea327..7eab9fb9ffc4 100644
--- a/arch/arm/configs/multi_v5_defconfig
+++ b/arch/arm/configs/multi_v5_defconfig
@@ -36,7 +36,6 @@ CONFIG_MACH_NET2BIG=y
 CONFIG_MACH_MSS2_DT=y
 CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_VERSATILE=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
diff --git a/arch/arm/configs/mv78xx0_defconfig b/arch/arm/configs/mv78xx0_defconfig
index 1174893102bd..823f7963b8b3 100644
--- a/arch/arm/configs/mv78xx0_defconfig
+++ b/arch/arm/configs/mv78xx0_defconfig
@@ -11,9 +11,7 @@ CONFIG_ARCH_MULTI_V5=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_MV78XX0=y
 CONFIG_MACH_TERASTATION_WXL=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
-CONFIG_FPE_NWFPE=y
 CONFIG_VFP=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/mvebu_v5_defconfig b/arch/arm/configs/mvebu_v5_defconfig
index 781f8f72df5f..0709a5e66bb5 100644
--- a/arch/arm/configs/mvebu_v5_defconfig
+++ b/arch/arm/configs/mvebu_v5_defconfig
@@ -22,7 +22,6 @@ CONFIG_MACH_MV2120=y
 CONFIG_MACH_D2NET_DT=y
 CONFIG_MACH_NET2BIG=y
 CONFIG_MACH_MSS2_DT=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
diff --git a/arch/arm/configs/mxs_defconfig b/arch/arm/configs/mxs_defconfig
index 603fb003b223..b0b5eb33d01e 100644
--- a/arch/arm/configs/mxs_defconfig
+++ b/arch/arm/configs/mxs_defconfig
@@ -17,7 +17,6 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_MXS=y
-CONFIG_AEABI=y
 CONFIG_MODULES=y
 CONFIG_MODULE_FORCE_LOAD=y
 CONFIG_MODULE_UNLOAD=y
diff --git a/arch/arm/configs/neponset_defconfig b/arch/arm/configs/neponset_defconfig
index 8a5dcca743fc..c3010a4d93a8 100644
--- a/arch/arm/configs/neponset_defconfig
+++ b/arch/arm/configs/neponset_defconfig
@@ -11,6 +11,7 @@ CONFIG_ZBOOT_ROM_BSS=0xc1000000
 CONFIG_ZBOOT_ROM=y
 CONFIG_CMDLINE="console=ttySA0,38400n8 cpufreq=221200 rw root=/dev/mtdblock2 mtdparts=sa1100:512K(boot),1M(kernel),2560K(initrd),4M(root) mem=32M noinitrd initrd=0xc0800000,3M"
 CONFIG_FPE_NWFPE=y
+# CONFIG_AEABI is not set
 CONFIG_PM=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
diff --git a/arch/arm/configs/netwinder_defconfig b/arch/arm/configs/netwinder_defconfig
index e639e6ad02cb..7ff70439458d 100644
--- a/arch/arm/configs/netwinder_defconfig
+++ b/arch/arm/configs/netwinder_defconfig
@@ -4,6 +4,7 @@ CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_FOOTBRIDGE=y
 CONFIG_ARCH_NETWINDER=y
+# CONFIG_AEABI is not set
 CONFIG_DEPRECATED_PARAM_STRUCT=y
 CONFIG_CMDLINE="root=0x801"
 CONFIG_FPE_NWFPE=y
diff --git a/arch/arm/configs/nhk8815_defconfig b/arch/arm/configs/nhk8815_defconfig
index 696b4fbc2412..7a307bd93730 100644
--- a/arch/arm/configs/nhk8815_defconfig
+++ b/arch/arm/configs/nhk8815_defconfig
@@ -12,7 +12,6 @@ CONFIG_KALLSYMS_ALL=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_NOMADIK=y
 CONFIG_MACH_NOMADIK_8815NHK=y
-CONFIG_AEABI=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 # CONFIG_SWAP is not set
diff --git a/arch/arm/configs/omap1_defconfig b/arch/arm/configs/omap1_defconfig
index 7bf58e8a5ab5..8d11ba724204 100644
--- a/arch/arm/configs/omap1_defconfig
+++ b/arch/arm/configs/omap1_defconfig
@@ -28,9 +28,7 @@ CONFIG_MACH_OMAP_PALMTE=y
 CONFIG_MACH_SX1=y
 CONFIG_MACH_NOKIA770=y
 CONFIG_MACH_AMS_DELTA=y
-CONFIG_AEABI=y
 CONFIG_CMDLINE="root=1f03 rootfstype=jffs2"
-CONFIG_FPE_NWFPE=y
 # CONFIG_SUSPEND is not set
 CONFIG_PM=y
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/orion5x_defconfig b/arch/arm/configs/orion5x_defconfig
index f5be2e26d9ae..d658d5e04e2d 100644
--- a/arch/arm/configs/orion5x_defconfig
+++ b/arch/arm/configs/orion5x_defconfig
@@ -20,10 +20,8 @@ CONFIG_MACH_TS409=y
 CONFIG_MACH_TS78XX=y
 CONFIG_MACH_MV2120=y
 CONFIG_MACH_NET2BIG=y
-CONFIG_AEABI=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
-CONFIG_FPE_NWFPE=y
 CONFIG_VFP=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/pxa168_defconfig b/arch/arm/configs/pxa168_defconfig
index 8cbca84fe33a..d6af01434f04 100644
--- a/arch/arm/configs/pxa168_defconfig
+++ b/arch/arm/configs/pxa168_defconfig
@@ -3,11 +3,9 @@ CONFIG_SYSVIPC=y
 CONFIG_NO_HZ_IDLE=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_PREEMPT=y
-CONFIG_AEABI=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_ARCH_MMP=y
 CONFIG_CMDLINE="root=/dev/nfs rootfstype=nfs nfsroot=192.168.2.100:/nfsroot/ ip=192.168.2.101:192.168.2.100::255.255.255.0::eth0:on console=ttyS0,115200 mem=128M"
-CONFIG_FPE_NWFPE=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
diff --git a/arch/arm/configs/pxa3xx_defconfig b/arch/arm/configs/pxa3xx_defconfig
index fb272e3a2337..2a777698d06f 100644
--- a/arch/arm/configs/pxa3xx_defconfig
+++ b/arch/arm/configs/pxa3xx_defconfig
@@ -7,9 +7,7 @@ CONFIG_KALLSYMS_ALL=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_PXA=y
 CONFIG_MACH_PXA3XX_DT=y
-CONFIG_AEABI=y
 CONFIG_CMDLINE="root=/dev/nfs rootfstype=nfs nfsroot=192.168.1.100:/nfsroot/ ip=192.168.1.101:192.168.1.100::255.255.255.0::eth0:on console=ttyS0,115200 mem=64M debug"
-CONFIG_FPE_NWFPE=y
 CONFIG_MODULES=y
 CONFIG_NET=y
 CONFIG_PACKET=y
diff --git a/arch/arm/configs/pxa910_defconfig b/arch/arm/configs/pxa910_defconfig
index 71ed0d73f8a9..9e7b11d1e723 100644
--- a/arch/arm/configs/pxa910_defconfig
+++ b/arch/arm/configs/pxa910_defconfig
@@ -10,8 +10,6 @@ CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
 # CONFIG_BLK_DEV_BSG is not set
-CONFIG_AEABI=y
-CONFIG_FPE_NWFPE=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
diff --git a/arch/arm/configs/pxa_defconfig b/arch/arm/configs/pxa_defconfig
index 66cc149c5ca4..396680975506 100644
--- a/arch/arm/configs/pxa_defconfig
+++ b/arch/arm/configs/pxa_defconfig
@@ -20,7 +20,6 @@ CONFIG_ARCH_GUMSTIX=y
 CONFIG_PXA_SHARPSL=y
 CONFIG_MACH_AKITA=y
 CONFIG_MACH_BORZOI=y
-CONFIG_AEABI=y
 CONFIG_ARCH_FORCE_MAX_ORDER=8
 CONFIG_CMDLINE="root=/dev/ram0 ro"
 CONFIG_CPU_FREQ=y
diff --git a/arch/arm/configs/rpc_defconfig b/arch/arm/configs/rpc_defconfig
index 46df453e224e..8d73ec43cb41 100644
--- a/arch/arm/configs/rpc_defconfig
+++ b/arch/arm/configs/rpc_defconfig
@@ -7,6 +7,7 @@ CONFIG_ARCH_MULTI_V4=y
 CONFIG_ARCH_RPC=y
 CONFIG_CPU_SA110=y
 CONFIG_FPE_NWFPE=y
+# CONFIG_AEABI is not set
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_PARTITION_ADVANCED=y
diff --git a/arch/arm/configs/spear13xx_defconfig b/arch/arm/configs/spear13xx_defconfig
index 6712ae741c19..648260f536a1 100644
--- a/arch/arm/configs/spear13xx_defconfig
+++ b/arch/arm/configs/spear13xx_defconfig
@@ -9,7 +9,6 @@ CONFIG_MACH_SPEAR1340=y
 CONFIG_SMP=y
 # CONFIG_SMP_ON_UP is not set
 # CONFIG_ARM_CPU_TOPOLOGY is not set
-CONFIG_AEABI=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_VFP=y
diff --git a/arch/arm/configs/spitz_defconfig b/arch/arm/configs/spitz_defconfig
index 8f8a058294fb..d68a8f9cdad4 100644
--- a/arch/arm/configs/spitz_defconfig
+++ b/arch/arm/configs/spitz_defconfig
@@ -11,7 +11,6 @@ CONFIG_PXA_SHARPSL=y
 CONFIG_MACH_AKITA=y
 CONFIG_MACH_BORZOI=y
 CONFIG_CMDLINE="console=ttyS0,115200n8 console=tty1 noinitrd root=/dev/mtdblock2 rootfstype=jffs2   debug"
-CONFIG_FPE_NWFPE=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
diff --git a/arch/arm/configs/versatile_defconfig b/arch/arm/configs/versatile_defconfig
index 849118cbbb44..8e89debb5a5b 100644
--- a/arch/arm/configs/versatile_defconfig
+++ b/arch/arm/configs/versatile_defconfig
@@ -6,7 +6,6 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_VERSATILE=y
-CONFIG_AEABI=y
 CONFIG_OABI_COMPAT=y
 CONFIG_CMDLINE="root=1f03 mem=32M"
 CONFIG_FPE_NWFPE=y
diff --git a/arch/arm/configs/vt8500_v6_v7_defconfig b/arch/arm/configs/vt8500_v6_v7_defconfig
index 41607a84abc8..2925a1f1dbb6 100644
--- a/arch/arm/configs/vt8500_v6_v7_defconfig
+++ b/arch/arm/configs/vt8500_v6_v7_defconfig
@@ -8,7 +8,6 @@ CONFIG_ARM_ERRATA_720789=y
 CONFIG_ARM_ERRATA_754322=y
 CONFIG_ARM_ERRATA_775420=y
 CONFIG_HAVE_ARM_ARCH_TIMER=y
-CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_HIGHPTE=y
 CONFIG_ARM_APPENDED_DTB=y
diff --git a/arch/arm/configs/wpcm450_defconfig b/arch/arm/configs/wpcm450_defconfig
index 67b64a378166..9cb379077d70 100644
--- a/arch/arm/configs/wpcm450_defconfig
+++ b/arch/arm/configs/wpcm450_defconfig
@@ -13,7 +13,6 @@ CONFIG_PROFILING=y
 CONFIG_ARCH_NPCM=y
 CONFIG_ARCH_WPCM450=y
 CONFIG_CPU_DCACHE_WRITETHROUGH=y
-CONFIG_AEABI=y
 CONFIG_UACCESS_WITH_MEMCPY=y
 # CONFIG_ATAGS is not set
 CONFIG_ARM_APPENDED_DTB=y
-- 
2.39.5

[PATCH v2 02/19] ARM: limit OABI support to StrongARM CPUs

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

As discussed on the mailing lists, there is no way to build OABI userspace
binaries any more since gcc-4.8, and now support is also getting dropped in
binutils, which will make it impossible to build pure OABI kernels at some
point in the future.

I found no evidence of anyone still sing OABI userspace on embedded systems
that keep getting kernel updates, but there are a few desktop-class machines
that date back to the 1990s using Intel StrongARM processors that were
supported by old versions of Debian, Red Hat or the official Corel
Netwinder distribution.

Add a much stricter Kconfig dependency for both native OABI and OABI_COMPAT
enabled kernels, only allowing either of them to be selected when building
a kernel that targets a StrongARM based machine.

Link: https://lore.kernel.org/lkml/2831c5a6-cfbf-4fe0-b51c-0396e5b0aeb7@app.fastmail.com/
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig                       | 14 +++++++-------
 arch/arm/configs/am200epdkit_defconfig |  1 -
 arch/arm/configs/axm55xx_defconfig     |  1 -
 arch/arm/configs/footbridge_defconfig  |  2 +-
 arch/arm/configs/neponset_defconfig    |  2 +-
 arch/arm/configs/versatile_defconfig   |  1 -
 6 files changed, 9 insertions(+), 12 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ccc0114d30de..3b2316dc9d13 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1151,8 +1151,7 @@ config ARM_PATCH_IDIV
 	  code to do integer division.
 
 config AEABI
-	bool "Use the ARM EABI to compile the kernel" if !CPU_V7 && \
-		!CPU_V7M && !CPU_V6 && !CPU_V6K && !CC_IS_CLANG
+	bool "Use the ARM EABI to compile the kernel" if CPU_SA110 || CPU_SA1100
 	default y
 	help
 	  The Arm EABI is the default ABI on all modern Linux
@@ -1162,9 +1161,13 @@ config AEABI
 	  Everyone should enable this, as support for OABI user space
 	  was dropped in gcc-4.8 and most distributions after ca. 2013.
 
+	  Support for OABI mode will be removed from the kernel
+	  once Intel StrongARM CPUs are phased out.
+
 config OABI_COMPAT
 	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
 	depends on AEABI && !THUMB2_KERNEL
+	depends on CPU_SA110 || CPU_SA1100
 	help
 	  This option preserves the old syscall interface along with the
 	  new (ARM EABI) one. It also provides a compatibility layer to
@@ -1177,11 +1180,8 @@ config OABI_COMPAT
 	  selected, since there is no way yet to sensibly distinguish
 	  between calling conventions during filtering.
 
-	  If you know you'll be using only pure EABI user space then you
-	  can say N here. If this option is not selected and you attempt
-	  to execute a legacy ABI binary then the result will be
-	  UNPREDICTABLE (in fact it can be predicted that it won't work
-	  at all). If in doubt say N.
+	  Support for OABI_COMPAT will be removed from the kernel
+	  once Intel StrongARM CPUs are phased out.
 
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y
diff --git a/arch/arm/configs/am200epdkit_defconfig b/arch/arm/configs/am200epdkit_defconfig
index b3f81237c6e1..d4745b0f3dcb 100644
--- a/arch/arm/configs/am200epdkit_defconfig
+++ b/arch/arm/configs/am200epdkit_defconfig
@@ -7,7 +7,6 @@ CONFIG_EXPERT=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_PXA=y
 CONFIG_ARCH_GUMSTIX=y
-# CONFIG_OABI_COMPAT is not set
 CONFIG_CMDLINE="console=ttyS0,115200n8 root=1f01 rootfstype=jffs2"
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
diff --git a/arch/arm/configs/axm55xx_defconfig b/arch/arm/configs/axm55xx_defconfig
index 12c59a4ee504..541e38e2205b 100644
--- a/arch/arm/configs/axm55xx_defconfig
+++ b/arch/arm/configs/axm55xx_defconfig
@@ -38,7 +38,6 @@ CONFIG_PCIE_AXXIA=y
 CONFIG_SMP=y
 CONFIG_NR_CPUS=16
 CONFIG_HOTPLUG_CPU=y
-CONFIG_OABI_COMPAT=y
 CONFIG_HIGHMEM=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
diff --git a/arch/arm/configs/footbridge_defconfig b/arch/arm/configs/footbridge_defconfig
index 589b7b1df8c6..e8bf9847d35d 100644
--- a/arch/arm/configs/footbridge_defconfig
+++ b/arch/arm/configs/footbridge_defconfig
@@ -9,9 +9,9 @@ CONFIG_ARCH_MULTI_V4=y
 CONFIG_ARCH_FOOTBRIDGE=y
 CONFIG_ARCH_EBSA285_HOST=y
 CONFIG_ARCH_NETWINDER=y
+# CONFIG_AEABI is not set
 CONFIG_FPE_NWFPE=y
 CONFIG_FPE_NWFPE_XP=y
-# CONFIG_AEABI is not set
 CONFIG_MODULES=y
 CONFIG_PARTITION_ADVANCED=y
 CONFIG_ACORN_PARTITION=y
diff --git a/arch/arm/configs/neponset_defconfig b/arch/arm/configs/neponset_defconfig
index c3010a4d93a8..16f0afd770c1 100644
--- a/arch/arm/configs/neponset_defconfig
+++ b/arch/arm/configs/neponset_defconfig
@@ -6,12 +6,12 @@ CONFIG_ARCH_MULTI_V4=y
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_ASSABET=y
 CONFIG_ASSABET_NEPONSET=y
+# CONFIG_AEABI is not set
 CONFIG_ZBOOT_ROM_TEXT=0x80000
 CONFIG_ZBOOT_ROM_BSS=0xc1000000
 CONFIG_ZBOOT_ROM=y
 CONFIG_CMDLINE="console=ttySA0,38400n8 cpufreq=221200 rw root=/dev/mtdblock2 mtdparts=sa1100:512K(boot),1M(kernel),2560K(initrd),4M(root) mem=32M noinitrd initrd=0xc0800000,3M"
 CONFIG_FPE_NWFPE=y
-# CONFIG_AEABI is not set
 CONFIG_PM=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
diff --git a/arch/arm/configs/versatile_defconfig b/arch/arm/configs/versatile_defconfig
index 8e89debb5a5b..bb9eb9ccbbde 100644
--- a/arch/arm/configs/versatile_defconfig
+++ b/arch/arm/configs/versatile_defconfig
@@ -6,7 +6,6 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_VERSATILE=y
-CONFIG_OABI_COMPAT=y
 CONFIG_CMDLINE="root=1f03 mem=32M"
 CONFIG_FPE_NWFPE=y
 CONFIG_VFP=y
-- 
2.39.5

[PATCH v2 03/19] ARM: rework ARM11 CPU selection logic

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Support for SMP on ARM1136r0 has been broken for a while, and nobody
is working on fixing it. I had a plan to change ARMv6 support to no
longer coexist in a common kernel with ARMv7 CPUs but instead ARMv5 and
below. This would have addressed the problem, but after a recent mailing
list discussion, we concluded that an easier approach is to just forbid
ARM1136r0 CPU support on SMP-enabled kernels.

This mainly affects users of the Nokia N800/N810 tablets using an
OMAP2420 SoC, which is the only commercial product with an ARM1136r0
that is still supported by the kernel.

The other machines that are still in the same hardware catogory are:

 - TI OMAP2420 H4 reference board
 - TI OMAP2430 SDP software development platform
 - Freescale/NXP i.MX31 Lite Development Kit
 - Buglabs i.MX31 Bug 1.x prototype
 - Arm Integrator/AP with CM1136JF-S core module

To my knowledge, none of these have any actual users aside from
reference boards being used more easily test the platforms.

There are also a few ARM1136r1 machines, which implement the
ARMv6K SMP support (barriers, atomics and TLS):

 - Eukrea CPUIMX35 reference platform
 - Freescale/NXP i.MX35 Product Development Kit
 - ARM Integrator/CP/IM-LT3 with ARM1136J Core Tile
 - ARM Realview/EB with ARM1136J Core Tile

Again, these are mainly reference implementations rather than
actual products, but since they support ARMv6K, they should
continue to work correctly in SMP-enabled kernels. For the
ARM Core Tile, I have not found a datasheet but instead use
the revision based on what the respective virtual models
report.

All the other ARMv6 platforms use an ARM1176 with ARMv6K,
VMSAv7 and Trustzone support.

To avoid the broken configuration, annotate the ARM1136 based
machines with specific CPU_ARM1136R0 or CPU_ARM1136R2 symbols
in Kconfig and make the r0 variants depend on !SMP.

Link: https://lore.kernel.org/linux-arm-kernel/2831c5a6-cfbf-4fe0-b51c-0396e5b0aeb7@app.fastmail.com/T/
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig.platforms      |  2 +-
 arch/arm/mach-imx/Kconfig       |  4 +++-
 arch/arm/mach-omap2/Kconfig     |  3 ++-
 arch/arm/mach-versatile/Kconfig | 10 +++++-----
 arch/arm/mm/Kconfig             | 24 +++++++++++++++++++++++-
 5 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/arch/arm/Kconfig.platforms b/arch/arm/Kconfig.platforms
index 386eccc81868..2e118b65f93b 100644
--- a/arch/arm/Kconfig.platforms
+++ b/arch/arm/Kconfig.platforms
@@ -33,7 +33,7 @@ config ARCH_MULTI_V4_V5
 config ARCH_MULTI_V6
 	bool "ARMv6 based platforms (ARM11)"
 	select ARCH_MULTI_V6_V7
-	select CPU_V6K
+	select CPU_ARM1176
 
 config ARCH_MULTI_V7
 	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index a361840d7a04..041e73ad203a 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -41,13 +41,15 @@ comment "ARM1136 platforms"
 
 config SOC_IMX31
 	bool "i.MX31 support"
-	select CPU_V6
+	depends on !SMP
+	select CPU_ARM1136R0
 	select MXC_AVIC
 	help
 	  This enables support for Freescale i.MX31 processor
 
 config SOC_IMX35
 	bool "i.MX35 support"
+	select CPU_ARM1136R1
 	select MXC_AVIC
 	help
 	  This enables support for Freescale i.MX35 processor
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index f3f19bcfca2c..13987ffbba00 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -8,8 +8,9 @@ config OMAP_HWMOD
 config ARCH_OMAP2
 	bool "TI OMAP2"
 	depends on ARCH_MULTI_V6
+	depends on !SMP
 	select ARCH_OMAP2PLUS
-	select CPU_V6
+	select CPU_ARM1136R0
 	select OMAP_HWMOD
 	select SOC_HAS_OMAP2_SDRC
 
diff --git a/arch/arm/mach-versatile/Kconfig b/arch/arm/mach-versatile/Kconfig
index 513618078440..de42da7de8c8 100644
--- a/arch/arm/mach-versatile/Kconfig
+++ b/arch/arm/mach-versatile/Kconfig
@@ -113,7 +113,8 @@ config INTEGRATOR_CM1136JFS
 	bool "Integrator/CM1136JF-S core module"
 	depends on ARCH_INTEGRATOR_AP
 	depends on ARCH_MULTI_V6
-	select CPU_V6
+	depends on !SMP
+	select CPU_ARM1136R0
 
 config ARCH_INTEGRATOR_CP
 	bool "Support Integrator/CP platform"
@@ -135,7 +136,7 @@ config INTEGRATOR_CTB36
 	bool "Integrator/CTB36 (ARM1136JF-S) core tile"
 	depends on ARCH_INTEGRATOR_CP
 	depends on ARCH_MULTI_V6
-	select CPU_V6
+	select CPU_ARM1136R1
 
 config ARCH_CINTEGRATOR
 	depends on ARCH_INTEGRATOR_CP
@@ -182,7 +183,7 @@ config MACH_REALVIEW_EB
 config REALVIEW_EB_ARM1136
 	bool "Support ARM1136J(F)-S Tile"
 	depends on MACH_REALVIEW_EB && ARCH_MULTI_V6
-	select CPU_V6
+	select CPU_ARM1136R1
 	help
 	  Enable support for the ARM1136 tile fitted to the
 	  Realview(R) Emulation Baseboard platform.
@@ -201,11 +202,10 @@ config REALVIEW_EB_A9MP
 	  Enable support for the Cortex-A9MPCore tile fitted to the
 	  Realview(R) Emulation Baseboard platform.
 
-# ARMv6 CPU without K extensions, but does have the new exclusive ops
 config MACH_REALVIEW_PB1176
 	bool "Support RealView(R) Platform Baseboard for ARM1176JZF-S"
 	depends on ARCH_MULTI_V6
-	select CPU_V6
+	select CPU_ARM1176
 	select HAVE_TCM
 	help
 	  Include support for the ARM(R) RealView(R) Platform Baseboard for
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 871bd58d2ccc..f3d71e89a31f 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -376,6 +376,7 @@ config CPU_PJ4B
 # ARMv6
 config CPU_V6
 	bool
+	depends on !SMP
 	select CPU_32v6
 	select CPU_ABRT_EV6
 	select CPU_CACHE_V6
@@ -386,7 +387,6 @@ config CPU_V6
 	select CPU_PABRT_V6
 	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V6 if MMU
-	select SMP_ON_UP if SMP
 
 # ARMv6k
 config CPU_V6K
@@ -403,6 +403,28 @@ config CPU_V6K
 	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V6 if MMU
 
+config CPU_ARM1136R0
+	bool
+	select CPU_V6
+	depends on !SMP
+	help
+	  These early revisions of ARM1136 lack support for the
+	  ARMv6k extensions for multiprocessing.
+
+config CPU_ARM1136R1
+	bool
+	select CPU_V6K
+	help
+	  Later revisions of ARM1136 add ARMv6k (atomics, barriers
+	  and TLS register) in addition to the features from r0.
+
+config CPU_ARM1176
+	bool
+	select CPU_V6K
+	help
+	  ARM1176 implements ARMv6k, VMSAv7 and Trustzone in
+	  addition to the ARMv6 baseline.
+
 # ARMv7 and ARMv8 architectures
 config CPU_V7
 	bool
-- 
2.39.5

[PATCH v2 04/19] ARM: deprecate support for ARM1136r0

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

This CPU revision remains a special case as it is now incompatible
with CONFIG_SMP. Only the Nokia N8x0 is used in practice, and even
that one is fairly rare these days, so let's plan to remove all of
them after the 2026 LTS kernel release.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-imx/Kconfig       |  5 ++++-
 arch/arm/mach-omap2/Kconfig     | 15 ++++++++++++---
 arch/arm/mach-versatile/Kconfig |  5 ++++-
 arch/arm/mm/Kconfig             |  2 ++
 4 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 041e73ad203a..f85a5f8c0a58 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -40,13 +40,16 @@ if ARCH_MULTI_V6
 comment "ARM1136 platforms"
 
 config SOC_IMX31
-	bool "i.MX31 support"
+	bool "i.MX31 support (DEPRECATED)"
 	depends on !SMP
 	select CPU_ARM1136R0
 	select MXC_AVIC
 	help
 	  This enables support for Freescale i.MX31 processor
 
+	  This SoC is scheduled for removal in early 2027,
+	  since it uses the ARM1136r0 CPU revision.
+
 config SOC_IMX35
 	bool "i.MX35 support"
 	select CPU_ARM1136R1
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 13987ffbba00..79f8afe3a6bf 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -207,18 +207,24 @@ comment "OMAP Core Type"
 	depends on ARCH_OMAP2
 
 config SOC_OMAP2420
-	bool "OMAP2420 support"
+	bool "OMAP2420 support (DEPRECATED)"
 	depends on ARCH_OMAP2
 	default y
 	select OMAP_DM_SYSTIMER
 	select OMAP_DM_TIMER
 	select SOC_HAS_OMAP2_SDRC
+	help
+	  This SoC is scheduled for removal in early 2027,
+	  since it uses the ARM1136r0 CPU revision.
 
 config SOC_OMAP2430
-	bool "OMAP2430 support"
+	bool "OMAP2430 support (DEPRECATED)"
 	depends on ARCH_OMAP2
 	default y
 	select SOC_HAS_OMAP2_SDRC
+	help
+	  This SoC is scheduled for removal in early 2027,
+	  since it uses the ARM1136r0 CPU revision.
 
 config SOC_OMAP3430
 	bool "OMAP3430 support"
@@ -249,11 +255,14 @@ config MACH_NOKIA_N810_WIMAX
 	bool
 
 config MACH_NOKIA_N8X0
-	bool "Nokia N800/N810"
+	bool "Nokia N800/N810 (DEPRECATED)"
 	depends on SOC_OMAP2420
 	default y
 	select MACH_NOKIA_N810
 	select MACH_NOKIA_N810_WIMAX
+	help
+	  This machine is scheduled for removal in early 2027,
+	  since it uses the ARM1136r0 CPU revision.
 
 endmenu
 
diff --git a/arch/arm/mach-versatile/Kconfig b/arch/arm/mach-versatile/Kconfig
index de42da7de8c8..1ee9b6608d71 100644
--- a/arch/arm/mach-versatile/Kconfig
+++ b/arch/arm/mach-versatile/Kconfig
@@ -110,11 +110,14 @@ config INTEGRATOR_CM1026EJS
 	select CPU_ARM1026
 
 config INTEGRATOR_CM1136JFS
-	bool "Integrator/CM1136JF-S core module"
+	bool "Integrator/CM1136JF-S core module (DEPRECATED)"
 	depends on ARCH_INTEGRATOR_AP
 	depends on ARCH_MULTI_V6
 	depends on !SMP
 	select CPU_ARM1136R0
+	help
+	  This machine is scheduled for removal in early 2027,
+	  since it uses the ARM1136r0 CPU revision.
 
 config ARCH_INTEGRATOR_CP
 	bool "Support Integrator/CP platform"
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index f3d71e89a31f..27010b9389ad 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -410,6 +410,8 @@ config CPU_ARM1136R0
 	help
 	  These early revisions of ARM1136 lack support for the
 	  ARMv6k extensions for multiprocessing.
+	  Support for this revision is scheduled for removal
+	  from the kernel in early 2027.
 
 config CPU_ARM1136R1
 	bool
-- 
2.39.5

[PATCH v2 05/19] ARM: turn CONFIG_ATAGS off by default

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Only a very small number of machines remain that rely on
traditional board files with the ATAGS boot data instead
of devicetree, and we have not accepted new ones for
a decade.

Most of the remaining ones are on their way out of the
kernel, but the Kconfig option that controls ATAGS
is still enabled by default.

To reflect the actual status of ATAGS support and alert
the remaining users of upstream and out-of-tree platforms
with this, chanyge it to being default-disabled and
add a dependency on CONFIG_EXPERT.

The board specific defconfig files that rely on ATAGS
are changed to turn on both EXPERT and ATAGS if they
were not doing thath already, and the ones that explicitly
turned it off before no longer need to.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig                       | 13 ++++++++-----
 arch/arm/configs/am200epdkit_defconfig |  1 +
 arch/arm/configs/aspeed_g4_defconfig   |  1 -
 arch/arm/configs/aspeed_g5_defconfig   |  1 -
 arch/arm/configs/assabet_defconfig     |  2 ++
 arch/arm/configs/at91_dt_defconfig     |  1 -
 arch/arm/configs/collie_defconfig      |  1 +
 arch/arm/configs/dove_defconfig        |  1 +
 arch/arm/configs/footbridge_defconfig  |  1 +
 arch/arm/configs/h3600_defconfig       |  2 ++
 arch/arm/configs/integrator_defconfig  |  1 -
 arch/arm/configs/jornada720_defconfig  |  2 ++
 arch/arm/configs/moxart_defconfig      |  1 -
 arch/arm/configs/mps2_defconfig        |  1 -
 arch/arm/configs/multi_v4t_defconfig   |  1 -
 arch/arm/configs/mv78xx0_defconfig     |  1 +
 arch/arm/configs/neponset_defconfig    |  2 ++
 arch/arm/configs/netwinder_defconfig   |  2 ++
 arch/arm/configs/omap1_defconfig       |  1 +
 arch/arm/configs/rpc_defconfig         |  2 ++
 arch/arm/configs/s3c6400_defconfig     |  2 ++
 arch/arm/configs/sama5_defconfig       |  1 -
 arch/arm/configs/sama7_defconfig       |  1 -
 arch/arm/configs/spitz_defconfig       |  1 +
 arch/arm/configs/stm32_defconfig       |  3 ++-
 arch/arm/configs/wpcm450_defconfig     |  1 -
 26 files changed, 31 insertions(+), 16 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3b2316dc9d13..0033d861e378 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1390,12 +1390,15 @@ config ARCH_WANT_FLAT_DTB_INSTALL
 
 config ATAGS
 	bool "Support for the traditional ATAGS boot data passing"
-	default y
+	depends on EXPERT
 	help
-	  This is the traditional way of passing data to the kernel at boot
-	  time. If you are solely relying on the flattened device tree (or
-	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
-	  to remove ATAGS support from your kernel binary.
+	  This is the traditional way of passing data to the kernel at
+	  boot but is now only used by a few of the oldest ARMv4 and
+	  ARMv5 machines.  Users that still rely on ATAGS should plan
+	  on migrating to devicetree based booting.
+
+	  Support for ATAGS will be removed when the last machine using
+	  it is either converted to DT or removed.
 
 config DEPRECATED_PARAM_STRUCT
 	bool "Provide old way to pass kernel parameters"
diff --git a/arch/arm/configs/am200epdkit_defconfig b/arch/arm/configs/am200epdkit_defconfig
index d4745b0f3dcb..61beac88e863 100644
--- a/arch/arm/configs/am200epdkit_defconfig
+++ b/arch/arm/configs/am200epdkit_defconfig
@@ -7,6 +7,7 @@ CONFIG_EXPERT=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_PXA=y
 CONFIG_ARCH_GUMSTIX=y
+CONFIG_ATAGS=y
 CONFIG_CMDLINE="console=ttyS0,115200n8 root=1f01 rootfstype=jffs2"
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
diff --git a/arch/arm/configs/aspeed_g4_defconfig b/arch/arm/configs/aspeed_g4_defconfig
index 3dcb80157f77..f86dd4ce7d0d 100644
--- a/arch/arm/configs/aspeed_g4_defconfig
+++ b/arch/arm/configs/aspeed_g4_defconfig
@@ -23,7 +23,6 @@ CONFIG_ARCH_ASPEED=y
 CONFIG_MACH_ASPEED_G4=y
 CONFIG_VMSPLIT_2G=y
 CONFIG_UACCESS_WITH_MEMCPY=y
-# CONFIG_ATAGS is not set
 CONFIG_JUMP_LABEL=y
 CONFIG_STRICT_KERNEL_RWX=y
 # CONFIG_BLK_DEBUG_FS is not set
diff --git a/arch/arm/configs/aspeed_g5_defconfig b/arch/arm/configs/aspeed_g5_defconfig
index ec558e57d081..45b937419dbd 100644
--- a/arch/arm/configs/aspeed_g5_defconfig
+++ b/arch/arm/configs/aspeed_g5_defconfig
@@ -29,7 +29,6 @@ CONFIG_VMSPLIT_2G=y
 CONFIG_NR_CPUS=2
 CONFIG_HIGHMEM=y
 CONFIG_UACCESS_WITH_MEMCPY=y
-# CONFIG_ATAGS is not set
 CONFIG_VFP=y
 CONFIG_NEON=y
 CONFIG_KERNEL_MODE_NEON=y
diff --git a/arch/arm/configs/assabet_defconfig b/arch/arm/configs/assabet_defconfig
index df63889b0c4c..e4264fdac2e5 100644
--- a/arch/arm/configs/assabet_defconfig
+++ b/arch/arm/configs/assabet_defconfig
@@ -1,11 +1,13 @@
 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_ASSABET=y
 # CONFIG_AEABI is not set
+CONFIG_ATAGS=y
 CONFIG_CMDLINE="mem=32M console=ttySA0,38400n8 initrd=0xc0800000,3M root=/dev/ram"
 CONFIG_FPE_NWFPE=y
 CONFIG_PM=y
diff --git a/arch/arm/configs/at91_dt_defconfig b/arch/arm/configs/at91_dt_defconfig
index 320eb27a6a2e..830c6c0dbdaf 100644
--- a/arch/arm/configs/at91_dt_defconfig
+++ b/arch/arm/configs/at91_dt_defconfig
@@ -19,7 +19,6 @@ CONFIG_SOC_SAM9X60=y
 CONFIG_SOC_SAM9X7=y
 # CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
 CONFIG_UACCESS_WITH_MEMCPY=y
-# CONFIG_ATAGS is not set
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_CMDLINE="console=ttyS0,115200 initrd=0x21100000,25165824 root=/dev/ram0 rw"
diff --git a/arch/arm/configs/collie_defconfig b/arch/arm/configs/collie_defconfig
index 165202960438..570a5f8bc57b 100644
--- a/arch/arm/configs/collie_defconfig
+++ b/arch/arm/configs/collie_defconfig
@@ -9,6 +9,7 @@ CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_COLLIE=y
+CONFIG_ATAGS=y
 CONFIG_CMDLINE="noinitrd root=/dev/mtdblock2 rootfstype=jffs2 fbcon=rotate:1"
 CONFIG_PM=y
 # CONFIG_SWAP is not set
diff --git a/arch/arm/configs/dove_defconfig b/arch/arm/configs/dove_defconfig
index 08271e6719d7..917a864fec74 100644
--- a/arch/arm/configs/dove_defconfig
+++ b/arch/arm/configs/dove_defconfig
@@ -8,6 +8,7 @@ CONFIG_ARCH_MULTI_V7=y
 CONFIG_ARCH_DOVE=y
 CONFIG_MACH_CM_A510=y
 CONFIG_HIGHMEM=y
+CONFIG_ATAGS=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_VFP=y
diff --git a/arch/arm/configs/footbridge_defconfig b/arch/arm/configs/footbridge_defconfig
index e8bf9847d35d..0872dba5de79 100644
--- a/arch/arm/configs/footbridge_defconfig
+++ b/arch/arm/configs/footbridge_defconfig
@@ -10,6 +10,7 @@ CONFIG_ARCH_FOOTBRIDGE=y
 CONFIG_ARCH_EBSA285_HOST=y
 CONFIG_ARCH_NETWINDER=y
 # CONFIG_AEABI is not set
+CONFIG_ATAGS=y
 CONFIG_FPE_NWFPE=y
 CONFIG_FPE_NWFPE_XP=y
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/h3600_defconfig b/arch/arm/configs/h3600_defconfig
index 0923d331190a..3e8da62d959d 100644
--- a/arch/arm/configs/h3600_defconfig
+++ b/arch/arm/configs/h3600_defconfig
@@ -4,11 +4,13 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_PREEMPT=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_H3600=y
 # CONFIG_CPU_FREQ_STAT is not set
+CONFIG_ATAGS=y
 CONFIG_MODULES=y
 CONFIG_NET=y
 CONFIG_UNIX=y
diff --git a/arch/arm/configs/integrator_defconfig b/arch/arm/configs/integrator_defconfig
index ba38ec810a61..82180381bf3c 100644
--- a/arch/arm/configs/integrator_defconfig
+++ b/arch/arm/configs/integrator_defconfig
@@ -13,7 +13,6 @@ CONFIG_ARCH_INTEGRATOR=y
 CONFIG_ARCH_INTEGRATOR_AP=y
 CONFIG_INTEGRATOR_IMPD1=y
 CONFIG_ARCH_INTEGRATOR_CP=y
-# CONFIG_ATAGS is not set
 CONFIG_CMDLINE="console=ttyAM0,38400n8 root=/dev/nfs ip=bootp"
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_GOV_POWERSAVE=y
diff --git a/arch/arm/configs/jornada720_defconfig b/arch/arm/configs/jornada720_defconfig
index 0ebddd083b36..a96cfb81aba5 100644
--- a/arch/arm/configs/jornada720_defconfig
+++ b/arch/arm/configs/jornada720_defconfig
@@ -1,11 +1,13 @@
 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_JORNADA720=y
 CONFIG_SA1100_JORNADA720_SSP=y
 CONFIG_PM=y
+CONFIG_ATAGS=y
 CONFIG_MODULES=y
 CONFIG_NET=y
 CONFIG_PACKET=y
diff --git a/arch/arm/configs/moxart_defconfig b/arch/arm/configs/moxart_defconfig
index d97d9ea5c34d..699d7ad98dd2 100644
--- a/arch/arm/configs/moxart_defconfig
+++ b/arch/arm/configs/moxart_defconfig
@@ -16,7 +16,6 @@ CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_MOXART=y
 CONFIG_MACH_UC7112LX=y
-# CONFIG_ATAGS is not set
 CONFIG_ARM_APPENDED_DTB=y
 # CONFIG_SWAP is not set
 # CONFIG_COMPAT_BRK is not set
diff --git a/arch/arm/configs/mps2_defconfig b/arch/arm/configs/mps2_defconfig
index e995e50537ef..cacf3876f6e4 100644
--- a/arch/arm/configs/mps2_defconfig
+++ b/arch/arm/configs/mps2_defconfig
@@ -16,7 +16,6 @@ CONFIG_ARCH_MPS2=y
 CONFIG_SET_MEM_PARAM=y
 CONFIG_DRAM_BASE=0x21000000
 CONFIG_DRAM_SIZE=0x1000000
-# CONFIG_ATAGS is not set
 # CONFIG_SUSPEND is not set
 # CONFIG_BLOCK is not set
 CONFIG_BINFMT_FLAT=y
diff --git a/arch/arm/configs/multi_v4t_defconfig b/arch/arm/configs/multi_v4t_defconfig
index 14c93bb59ad6..7b592345db21 100644
--- a/arch/arm/configs/multi_v4t_defconfig
+++ b/arch/arm/configs/multi_v4t_defconfig
@@ -17,7 +17,6 @@ CONFIG_INTEGRATOR_IMPD1=y
 CONFIG_INTEGRATOR_CM720T=y
 CONFIG_INTEGRATOR_CM920T=y
 CONFIG_INTEGRATOR_CM922T_XA10=y
-# CONFIG_ATAGS is not set
 CONFIG_CPU_IDLE=y
 CONFIG_ARM_CPUIDLE=y
 CONFIG_ARM_CLPS711X_CPUIDLE=y
diff --git a/arch/arm/configs/mv78xx0_defconfig b/arch/arm/configs/mv78xx0_defconfig
index 823f7963b8b3..e3cc8de7c1c2 100644
--- a/arch/arm/configs/mv78xx0_defconfig
+++ b/arch/arm/configs/mv78xx0_defconfig
@@ -12,6 +12,7 @@ CONFIG_ARCH_MULTI_V5=y
 CONFIG_ARCH_MV78XX0=y
 CONFIG_MACH_TERASTATION_WXL=y
 CONFIG_HIGHMEM=y
+CONFIG_ATAGS=y
 CONFIG_VFP=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/neponset_defconfig b/arch/arm/configs/neponset_defconfig
index 16f0afd770c1..d5d6d57f8fea 100644
--- a/arch/arm/configs/neponset_defconfig
+++ b/arch/arm/configs/neponset_defconfig
@@ -1,12 +1,14 @@
 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_ASSABET=y
 CONFIG_ASSABET_NEPONSET=y
 # CONFIG_AEABI is not set
+CONFIG_ATAGS=y
 CONFIG_ZBOOT_ROM_TEXT=0x80000
 CONFIG_ZBOOT_ROM_BSS=0xc1000000
 CONFIG_ZBOOT_ROM=y
diff --git a/arch/arm/configs/netwinder_defconfig b/arch/arm/configs/netwinder_defconfig
index 7ff70439458d..77d4a2b5916b 100644
--- a/arch/arm/configs/netwinder_defconfig
+++ b/arch/arm/configs/netwinder_defconfig
@@ -1,10 +1,12 @@
 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_FOOTBRIDGE=y
 CONFIG_ARCH_NETWINDER=y
 # CONFIG_AEABI is not set
+CONFIG_ATAGS=y
 CONFIG_DEPRECATED_PARAM_STRUCT=y
 CONFIG_CMDLINE="root=0x801"
 CONFIG_FPE_NWFPE=y
diff --git a/arch/arm/configs/omap1_defconfig b/arch/arm/configs/omap1_defconfig
index 8d11ba724204..fcbaaf37bc9b 100644
--- a/arch/arm/configs/omap1_defconfig
+++ b/arch/arm/configs/omap1_defconfig
@@ -28,6 +28,7 @@ CONFIG_MACH_OMAP_PALMTE=y
 CONFIG_MACH_SX1=y
 CONFIG_MACH_NOKIA770=y
 CONFIG_MACH_AMS_DELTA=y
+CONFIG_ATAGS=y
 CONFIG_CMDLINE="root=1f03 rootfstype=jffs2"
 # CONFIG_SUSPEND is not set
 CONFIG_PM=y
diff --git a/arch/arm/configs/rpc_defconfig b/arch/arm/configs/rpc_defconfig
index 8d73ec43cb41..edb52d56f679 100644
--- a/arch/arm/configs/rpc_defconfig
+++ b/arch/arm/configs/rpc_defconfig
@@ -2,12 +2,14 @@
 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EXPERT=y
 CONFIG_ARCH_MULTI_V4=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_RPC=y
 CONFIG_CPU_SA110=y
 CONFIG_FPE_NWFPE=y
 # CONFIG_AEABI is not set
+CONFIG_ATAGS=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_PARTITION_ADVANCED=y
diff --git a/arch/arm/configs/s3c6400_defconfig b/arch/arm/configs/s3c6400_defconfig
index 7bf28a83946a..a0707707d960 100644
--- a/arch/arm/configs/s3c6400_defconfig
+++ b/arch/arm/configs/s3c6400_defconfig
@@ -2,8 +2,10 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_ARCH_MULTI_V6=y
 # CONFIG_ARCH_MULTI_V7 is not set
+CONFIG_EXPERT=y
 CONFIG_ARCH_S3C64XX=y
 CONFIG_MACH_WLF_CRAGG_6410=y
+CONFIG_ATAGS=y
 CONFIG_CMDLINE="console=ttySAC0,115200 root=/dev/ram init=/linuxrc initrd=0x51000000,6M ramdisk_size=6144"
 CONFIG_VFP=y
 CONFIG_MODULES=y
diff --git a/arch/arm/configs/sama5_defconfig b/arch/arm/configs/sama5_defconfig
index bd7f0b5f7d66..1eafad9139f1 100644
--- a/arch/arm/configs/sama5_defconfig
+++ b/arch/arm/configs/sama5_defconfig
@@ -13,7 +13,6 @@ CONFIG_SOC_SAMA5D3=y
 CONFIG_SOC_SAMA5D4=y
 # CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
 CONFIG_UACCESS_WITH_MEMCPY=y
-# CONFIG_ATAGS is not set
 CONFIG_CMDLINE="console=ttyS0,115200 initrd=0x21100000,25165824 root=/dev/ram0 rw"
 CONFIG_VFP=y
 CONFIG_NEON=y
diff --git a/arch/arm/configs/sama7_defconfig b/arch/arm/configs/sama7_defconfig
index cc7f6daf9fc7..4af87c57483d 100644
--- a/arch/arm/configs/sama7_defconfig
+++ b/arch/arm/configs/sama7_defconfig
@@ -20,7 +20,6 @@ CONFIG_ATMEL_CLOCKSOURCE_TCB=y
 # CONFIG_CPU_SW_DOMAIN_PAN is not set
 CONFIG_ARCH_FORCE_MAX_ORDER=14
 CONFIG_UACCESS_WITH_MEMCPY=y
-# CONFIG_ATAGS is not set
 CONFIG_CMDLINE="console=ttyS0,115200 earlyprintk ignore_loglevel"
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE=y
diff --git a/arch/arm/configs/spitz_defconfig b/arch/arm/configs/spitz_defconfig
index d68a8f9cdad4..c7cf089001bf 100644
--- a/arch/arm/configs/spitz_defconfig
+++ b/arch/arm/configs/spitz_defconfig
@@ -10,6 +10,7 @@ CONFIG_ARCH_PXA=y
 CONFIG_PXA_SHARPSL=y
 CONFIG_MACH_AKITA=y
 CONFIG_MACH_BORZOI=y
+CONFIG_ATAGS=y
 CONFIG_CMDLINE="console=ttyS0,115200n8 console=tty1 noinitrd root=/dev/mtdblock2 rootfstype=jffs2   debug"
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
diff --git a/arch/arm/configs/stm32_defconfig b/arch/arm/configs/stm32_defconfig
index 82190b155b14..bdf3bb9e03a8 100644
--- a/arch/arm/configs/stm32_defconfig
+++ b/arch/arm/configs/stm32_defconfig
@@ -20,7 +20,8 @@ CONFIG_ARCH_STM32=y
 CONFIG_CPU_V7M_NUM_IRQ=240
 CONFIG_SET_MEM_PARAM=y
 CONFIG_DRAM_BASE=0x90000000
-# CONFIG_ATAGS is not set
+CONFIG_FLASH_MEM_BASE=0x08000000
+CONFIG_FLASH_SIZE=0x00200000
 CONFIG_XIP_KERNEL=y
 CONFIG_XIP_PHYS_ADDR=0x08008000
 # CONFIG_SUSPEND is not set
diff --git a/arch/arm/configs/wpcm450_defconfig b/arch/arm/configs/wpcm450_defconfig
index 9cb379077d70..7512ec4292a0 100644
--- a/arch/arm/configs/wpcm450_defconfig
+++ b/arch/arm/configs/wpcm450_defconfig
@@ -14,7 +14,6 @@ CONFIG_ARCH_NPCM=y
 CONFIG_ARCH_WPCM450=y
 CONFIG_CPU_DCACHE_WRITETHROUGH=y
 CONFIG_UACCESS_WITH_MEMCPY=y
-# CONFIG_ATAGS is not set
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_CPU_IDLE=y
 CONFIG_KPROBES=y
-- 
2.39.5

[PATCH v2 06/19] ARM: mark CPU_ENDIAN_BE8 as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Following the deprecation of big-endian ARMv8 mode in arch/arm64 in commit
1cf89b6bf660 ("arm64: Kconfig: Make CPU_BIG_ENDIAN depend on BROKEN"),
this does the same for ARMv7 (and v6), leaving the code around but
disabled by default: There are no known products that make use of this
mode any more, and it only hangs around for testing that it still works.

At the moment, there are no known bugs with big-endian ARMv7 mode, but
it does break occasionally and require someone to fix it.  By marking
the code as 'depends on BROKEN' now, it will no longer be covered by CI
testing. If any users remain, they can keep patching out the dependency
but are more likely to run into regressions.

The big-endian ARMv5 support (CONFIG_CPU_ENDIAN_BE32) in contrast is
still used on Intel IXP4xx platform, and is the only currently supported
mode there, so this one can still be enabled.

There is no timeline for actually removing the code at this point,
we will likely debate this if we ever remove IXP4xx support on arm,
or big-endian support on ARM64.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mm/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 27010b9389ad..048edb011511 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -778,7 +778,8 @@ config CPU_LITTLE_ENDIAN
 	  space builds.
 
 config CPU_BIG_ENDIAN
-	bool "Build big-endian kernel"
+	bool "Build big-endian kernel (DEPRECATED)"
+	depends on ARCH_MULTI_V5 || BROKEN
 	depends on !LD_IS_LLD
 	help
 	  Say Y if you plan on running a kernel in big-endian mode.
-- 
2.39.5

[PATCH v2 07/19] ARM: update DEPRECATED_PARAM_STRUCT removal timeline

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

This configuration option is for the older boot method that preceeded
ATAGS. This was scheduled for removal back in 2001, but the removal
never happened, presumably because nobody cared enough to actually do it,
not because there are any users left.

Add "(DEPRECATED)' to the Kconfig line and update the timeline so we can
remove it next year along with the other options that are not scheduled
for that timeframe.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 0033d861e378..48937e70d55a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1401,11 +1401,11 @@ config ATAGS
 	  it is either converted to DT or removed.
 
 config DEPRECATED_PARAM_STRUCT
-	bool "Provide old way to pass kernel parameters"
+	bool "Provide old way to pass kernel parameters (DEPRECATED)"
 	depends on ATAGS
 	help
 	  This was deprecated in 2001 and announced to live on for 5 years.
-	  Some old boot loaders still use this way.
+	  It is now scheduled for removal in early 2027.
 
 # Compressed boot loader in ROM.  Yes, we really want to ask about
 # TEXT and BSS so we preserve their values in the config files.
-- 
2.39.5

[PATCH v2 08/19] ARM: s3c64xx: extend deprecation schedule

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Mark Brown is still using this machine for regular work, so it should
not be removed as originally scheduled.

Give the platform another year, with the option to extend it further
based on the state of ATAGS support next year.

I expect that we end up removing all of s3c64xx when either Mark has
moved his test setup to other hardware, or when all other ATAGS based
machines are getting removed.

Cc: Mark Brown <broonie@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-s3c/Kconfig.s3c64xx | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-s3c/Kconfig.s3c64xx b/arch/arm/mach-s3c/Kconfig.s3c64xx
index 3f97fba8e4f5..52cfd9fb2a43 100644
--- a/arch/arm/mach-s3c/Kconfig.s3c64xx
+++ b/arch/arm/mach-s3c/Kconfig.s3c64xx
@@ -23,10 +23,17 @@ menuconfig ARCH_S3C64XX
 	help
 	  Samsung S3C64XX series based systems
 
-	  The platform is deprecated and scheduled for removal. Please reach to
-	  the maintainers of the platform and linux-samsung-soc@vger.kernel.org if
-	  you still use it.
-	  Without such feedback, the platform will be removed after 2024.
+	  The use of ATAGS based board files is on its way out, and
+	  the only remaining S3C64xx machine in the kernel (Wolfson
+	  Cragganmore 6410) relies on this, without any realistic way
+	  to migrate it to devicetree.
+
+	  Support for S3C64XX will be kept until the 2027 LTS kernel
+	  release and may be removed in early 2028.
+
+	  Please reach out to the maintainers of the platform and
+	  linux-samsung-soc@vger.kernel.org if you use any additional
+	  s3c64xx machines based on devicetree.
 
 if ARCH_S3C64XX
 
-- 
2.39.5

[PATCH v2 09/19] ARM: update FPE_NWFPE help text

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The help text is seriously outdated and predates the introduction of
VFP floating point units that were available as early as some ARM926
based systems.

Change the help text to reflect that this is now a legacy feature
and that it will go away along with OABI support in the future.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 48937e70d55a..1f02183cff13 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1651,16 +1651,16 @@ menu "Floating point emulation"
 comment "At least one emulation must be selected"
 
 config FPE_NWFPE
-	bool "NWFPE math emulation"
+	bool "NWFPE math emulation (DEPRECATED)"
 	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
 	help
 	  Say Y to include the NWFPE floating point emulator in the kernel.
-	  This is necessary to run most binaries. Linux does not currently
-	  support floating point hardware so you need to say Y here even if
-	  your machine has an FPA or floating point co-processor podule.
 
-	  You may say N here if you are going to load the Acorn FPEmulator
-	  early in the bootup.
+	  This is only used on OABI userspace binaries, either using a
+	  pure OABI (!CONFIG_AEABI) kernel, or the OABI emulation.
+
+	  Support for NWFPE will be removed in the future when OABI
+	  support is removed.
 
 config FPE_NWFPE_XP
 	bool "Support extended precision"
-- 
2.39.5

[PATCH v2 10/19] ARM: mark IWMMXT as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

With no remaining users and support getting removed from future compilers,
there seems little point in keeping iwmmxt around much longer.

On the other hand, the iwmmxt support in the kernel rarely gets in the
way, so there is little cost, so set a removal date of early 2027 for
the moment. If anyone is still using this, it can be extended as long
there is binutils support.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1f02183cff13..e2bdf2591c10 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -513,13 +513,21 @@ config PLAT_VERSATILE
 source "arch/arm/mm/Kconfig"
 
 config IWMMXT
-	bool "Enable iWMMXt support"
-	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
-	default y if PXA27x || PXA3xx || ARCH_MMP
+	bool "Enable iWMMXt support (DEPRECATED)"
+	depends on PXA27x || PXA3xx || ARCH_MMP
 	help
 	  Enable support for iWMMXt context switching at run time if
 	  running on a CPU that supports it.
 
+	  Machines that actually support this feature are very rare,
+	  and support is deprecated in new gcc-14.  While there were a
+	  few applications that used this in the past, none are known
+	  to still do so.
+
+	  If you use this, please send a patch to remove the
+	  deprecation, otherwise this will be removed in early
+	  2027.
+
 if !MMU
 source "arch/arm/Kconfig-nommu"
 endif
-- 
2.39.5

[PATCH v2 11/19] ARM: mark ARCH_DOVE as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The Marvell Armada 510 (Dove) platform is supported both as devicetree
and atags/boardfile variants, with varying degrees of hardware support.

Russell was the last known user of the board file version, and there
are very few users overall. Unless Russell still needs this variant,
let's remove after the next LTS kernel, leaving the CONFIG_MACH_DOVE
variant with devicetree.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-dove/Kconfig | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-dove/Kconfig b/arch/arm/mach-dove/Kconfig
index 996888ffcfe7..f547120e223e 100644
--- a/arch/arm/mach-dove/Kconfig
+++ b/arch/arm/mach-dove/Kconfig
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 menuconfig ARCH_DOVE
-	bool "Marvell Dove" if ARCH_MULTI_V7
+	bool "Marvell Dove (DEPRECATED)" if ARCH_MULTI_V7
 	depends on ATAGS
 	select CPU_PJ4
 	select GPIOLIB
@@ -11,7 +11,11 @@ menuconfig ARCH_DOVE
 	select PM_GENERIC_DOMAINS if PM
 	select PCI_QUIRKS if PCI
 	help
-	  Support for the Marvell Dove SoC 88AP510
+	  Support for the Marvell Dove SoC 88AP510 using board files.
+
+	  Support for this machine will be removed in early 2027, unless
+	  there is a strong reason to keep it. Users should migrate to
+	  the devicetree-enabled version (CONFIG_MACH_DOVE) instead.
 
 if ARCH_DOVE
 
-- 
2.39.5

[PATCH v2 12/19] ARM: PXA: mark remaining board files as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

In the 2021 board file removal, the gumstix and sharpsl
support was left around in order to make it easier to convert
more of the PXA platform to device tree, given that both
platforms had some level of support in qemu.

As far as I can tell, nobody has worked on additional DT
conversion in that time, and qemu has in turn deprecated
the entire PXA platform.

Schedule the remaining board files for removal now, as they
are unlikely to be of any help in the future. If anyone
wants to revive support for these machines, they can
obviously still contribute device tree based code and
work on updating the corresponding drivers.

Any drivers that are only usable on legacy PXA board files
can also get removed along with the boards, or saved by
adding devicetree support.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/configs/pxa_defconfig |  4 ----
 arch/arm/mach-pxa/Kconfig      | 10 ++++++++--
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/arch/arm/configs/pxa_defconfig b/arch/arm/configs/pxa_defconfig
index 396680975506..e7a7ed2b7ef7 100644
--- a/arch/arm/configs/pxa_defconfig
+++ b/arch/arm/configs/pxa_defconfig
@@ -16,10 +16,6 @@ CONFIG_PROFILING=y
 CONFIG_KEXEC=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_PXA=y
-CONFIG_ARCH_GUMSTIX=y
-CONFIG_PXA_SHARPSL=y
-CONFIG_MACH_AKITA=y
-CONFIG_MACH_BORZOI=y
 CONFIG_ARCH_FORCE_MAX_ORDER=8
 CONFIG_CMDLINE="root=/dev/ram0 ro"
 CONFIG_CPU_FREQ=y
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 66e26990e2c8..1fa282a9ef38 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -58,12 +58,15 @@ if ATAGS
 comment "Legacy board files"
 
 config ARCH_GUMSTIX
-	bool "Gumstix XScale 255 boards"
+	bool "Gumstix XScale 255 boards (DEPRECATED)"
 	select PXA25x
 	help
 	  Say Y here if you intend to run this kernel on
 	  Basix, Connex, ws-200ax, ws-400ax systems
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 choice
 	prompt "Gumstix Carrier/Expansion Board"
 	depends on ARCH_GUMSTIX
@@ -77,7 +80,7 @@ config GUMSTIX_AM300EPD
 endchoice
 
 config PXA_SHARPSL
-	bool "SHARP Zaurus SL-5600, SL-C7xx and SL-Cxx00 Models"
+	bool "SHARP Zaurus SL-5600, SL-C7xx and SL-Cxx00 Models (DEPRECATED)"
 	select SHARP_PARAM
 	select SHARP_SCOOP
 	help
@@ -87,6 +90,9 @@ config PXA_SHARPSL
 	  SL-C3000 (Spitz), SL-C3100 (Borzoi) or SL-C6000x (Tosa)
 	  handheld computer.
 
+	  Support for these machines will go away in early 2027,
+	  unless they get converted to device tree.
+
 config PXA_SHARPSL_DETECT_MACH_ID
 	bool "Detect machine ID at run-time in the decompressor"
 	depends on PXA_SHARPSL
-- 
2.39.5

[PATCH v2 13/19] ARM: orion5x: mark all board files as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Conversion of the old orion5x board files to devicetree has
stalled over the past few years, so it seems better to remove
the remaining ones in order to allow  cleaning up the device
drivers.

Debian has previously removed the orion/kirkwood kernel
binary from the armel distro, but building custom kernels
from the Debian source code should keep working, so
removing the board files after the 6.12 release ensures
that this remains possible for the Debian Trixie release,
assuming this will use the 6.12 LTS kernel.

Jeremy Peper still plans to convert the Terastation 2 Pro
to devicetree in the future, but that can be done even
after it is removed.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/configs/multi_v5_defconfig |  9 ------
 arch/arm/configs/mvebu_v5_defconfig |  9 ------
 arch/arm/configs/orion5x_defconfig  |  9 ------
 arch/arm/mach-orion5x/Kconfig       | 47 +++++++++++++++++++++++------
 4 files changed, 37 insertions(+), 37 deletions(-)

diff --git a/arch/arm/configs/multi_v5_defconfig b/arch/arm/configs/multi_v5_defconfig
index 7eab9fb9ffc4..a0d2fb2fcf9a 100644
--- a/arch/arm/configs/multi_v5_defconfig
+++ b/arch/arm/configs/multi_v5_defconfig
@@ -22,17 +22,8 @@ CONFIG_ARCH_NPCM=y
 CONFIG_ARCH_WPCM450=y
 CONFIG_ARCH_ORION5X=y
 CONFIG_MACH_RD88F5182_DT=y
-CONFIG_MACH_KUROBOX_PRO=y
-CONFIG_MACH_DNS323=y
-CONFIG_MACH_TS209=y
-CONFIG_MACH_TERASTATION_PRO2=y
-CONFIG_MACH_LINKSTATION_PRO=y
 CONFIG_MACH_LINKSTATION_MINI=y
-CONFIG_MACH_TS409=y
-CONFIG_MACH_TS78XX=y
-CONFIG_MACH_MV2120=y
 CONFIG_MACH_D2NET_DT=y
-CONFIG_MACH_NET2BIG=y
 CONFIG_MACH_MSS2_DT=y
 CONFIG_ARCH_SUNXI=y
 CONFIG_ARCH_VERSATILE=y
diff --git a/arch/arm/configs/mvebu_v5_defconfig b/arch/arm/configs/mvebu_v5_defconfig
index 0709a5e66bb5..dbc6c511e70b 100644
--- a/arch/arm/configs/mvebu_v5_defconfig
+++ b/arch/arm/configs/mvebu_v5_defconfig
@@ -10,17 +10,8 @@ CONFIG_ARCH_MVEBU=y
 CONFIG_MACH_KIRKWOOD=y
 CONFIG_ARCH_ORION5X=y
 CONFIG_MACH_RD88F5182_DT=y
-CONFIG_MACH_KUROBOX_PRO=y
-CONFIG_MACH_DNS323=y
-CONFIG_MACH_TS209=y
-CONFIG_MACH_TERASTATION_PRO2=y
-CONFIG_MACH_LINKSTATION_PRO=y
 CONFIG_MACH_LINKSTATION_MINI=y
-CONFIG_MACH_TS409=y
-CONFIG_MACH_TS78XX=y
-CONFIG_MACH_MV2120=y
 CONFIG_MACH_D2NET_DT=y
-CONFIG_MACH_NET2BIG=y
 CONFIG_MACH_MSS2_DT=y
 CONFIG_HIGHMEM=y
 CONFIG_ARM_APPENDED_DTB=y
diff --git a/arch/arm/configs/orion5x_defconfig b/arch/arm/configs/orion5x_defconfig
index d658d5e04e2d..f47a84ac872f 100644
--- a/arch/arm/configs/orion5x_defconfig
+++ b/arch/arm/configs/orion5x_defconfig
@@ -10,16 +10,7 @@ CONFIG_ARCH_MULTI_V5=y
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_ORION5X=y
 CONFIG_MACH_RD88F5182_DT=y
-CONFIG_MACH_KUROBOX_PRO=y
-CONFIG_MACH_DNS323=y
-CONFIG_MACH_TS209=y
-CONFIG_MACH_TERASTATION_PRO2=y
-CONFIG_MACH_LINKSTATION_PRO=y
 CONFIG_MACH_LINKSTATION_MINI=y
-CONFIG_MACH_TS409=y
-CONFIG_MACH_TS78XX=y
-CONFIG_MACH_MV2120=y
-CONFIG_MACH_NET2BIG=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_VFP=y
diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig
index cef19bea6164..c61999d01c80 100644
--- a/arch/arm/mach-orion5x/Kconfig
+++ b/arch/arm/mach-orion5x/Kconfig
@@ -19,7 +19,7 @@ menuconfig ARCH_ORION5X
 if ARCH_ORION5X
 
 config ARCH_ORION5X_DT
-	bool "Marvell Orion5x Flattened Device Tree"
+	def_bool y
 	select ORION_CLK
 	select ORION_IRQCHIP
 	select ORION_TIMER
@@ -38,37 +38,49 @@ config MACH_RD88F5182_DT
 	  Orion-NAS (88F5182) RD2, Flattened Device Tree.
 
 config MACH_KUROBOX_PRO
-	bool "KuroBox Pro"
+	bool "KuroBox Pro (DEPRECATED)"
 	select I2C_BOARDINFO if I2C
 	depends on ATAGS
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  KuroBox Pro platform.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_DNS323
-	bool "D-Link DNS-323"
+	bool "D-Link DNS-323 (DEPRECATED)"
 	select I2C_BOARDINFO if I2C
 	depends on ATAGS
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  D-Link DNS-323 platform.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_TS209
-	bool "QNAP TS-109/TS-209"
+	bool "QNAP TS-109/TS-209 (DEPRECATED)"
 	depends on ATAGS
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  QNAP TS-109/TS-209 platform.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_TERASTATION_PRO2
-	bool "Buffalo Terastation Pro II/Live"
+	bool "Buffalo Terastation Pro II/Live (DEPRECATED)"
 	depends on ATAGS
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Buffalo Terastation Pro II/Live platform.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_LINKSTATION_PRO
-	bool "Buffalo Linkstation Pro/Live"
+	bool "Buffalo Linkstation Pro/Live (DEPRECATED)"
 	depends on ATAGS
 	select I2C_BOARDINFO if I2C
 	help
@@ -76,6 +88,9 @@ config MACH_LINKSTATION_PRO
 	  Buffalo Linkstation Pro/Live platform. Both v1 and
 	  v2 devices are supported.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_LINKSTATION_MINI
 	bool "Buffalo Linkstation Mini (Flattened Device Tree)"
 	select ARCH_ORION5X_DT
@@ -84,26 +99,35 @@ config MACH_LINKSTATION_MINI
 	  Buffalo Linkstation Mini (LS-WSGL) platform.
 
 config MACH_TS409
-	bool "QNAP TS-409"
+	bool "QNAP TS-409 (DEPRECATED)"
 	depends on ATAGS
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  QNAP TS-409 platform.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_TS78XX
-	bool "Technologic Systems TS-78xx"
+	bool "Technologic Systems TS-78xx (DEPRECATED)"
 	depends on ATAGS
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  Technologic Systems TS-78xx platform.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_MV2120
-	bool "HP Media Vault mv2120"
+	bool "HP Media Vault mv2120 (DEPRECATED)"
 	depends on ATAGS
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  HP Media Vault mv2120 or mv5100.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_D2NET_DT
 	bool "LaCie d2 Network / Big Disk Network (Flattened Device Tree)"
 	select ARCH_ORION5X_DT
@@ -112,13 +136,16 @@ config MACH_D2NET_DT
 	  LaCie d2 Network NAS.
 
 config MACH_NET2BIG
-	bool "LaCie 2Big Network"
+	bool "LaCie 2Big Network (DEPRECATED)"
 	depends on ATAGS
 	select I2C_BOARDINFO if I2C
 	help
 	  Say 'Y' here if you want your kernel to support the
 	  LaCie 2Big Network NAS.
 
+	  Support for this machine will go away in early 2027,
+	  unless it gets converted to device tree.
+
 config MACH_MSS2_DT
 	bool "Maxtor Shared Storage II (Flattened Device Tree)"
 	select ARCH_ORION5X_DT
-- 
2.39.5

[PATCH v2 14/19] ARM: mark mach-sa1100 as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Most of the old StrongARM1100 machines were removed two years ago as part
of a wider cleanup, the remaining four were left either because someone
showed interest in converting them to devicetree, or because they were
still supported by qemu and therefore useful to keep the platform alive.

None of the devicetree conversion actually happened, and qemu has
marked the platform as deprecated, so do the same in the kernel now.

If anyone is still running one of these four machines and planning
to keep updating their kernels, please speak up now so we can adapt
the plans as needed.

If nobody is found using StrongARM1100 any more, it can be removing
during 2027, leaving 6.12-LTS as the last longterm support kernel
for it.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-sa1100/Kconfig | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-sa1100/Kconfig b/arch/arm/mach-sa1100/Kconfig
index e23700e0d6c8..d50721e39641 100644
--- a/arch/arm/mach-sa1100/Kconfig
+++ b/arch/arm/mach-sa1100/Kconfig
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig ARCH_SA1100
-	bool "SA11x0 Implementations"
+	bool "SA11x0 Implementations (DEPRECATED)"
 	depends on ARCH_MULTI_V4 && !(ARCH_MULTI_V4T || ARCH_MULTI_V5)
 	depends on !(ARCH_MOXART || ARCH_GEMINI)
 	depends on ATAGS
@@ -20,6 +20,9 @@ menuconfig ARCH_SA1100
 	help
 	  Support for StrongARM 11x0 based boards.
 
+	  Support for these machines will go away in 2027,
+	  unless there are any remaining users that speak up.
+
 if ARCH_SA1100
 
 config SA1100_ASSABET
-- 
2.39.5

[PATCH v2 15/19] ARM: mark RiscPC as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

This platform is the oldest still supported machine, dating back
to the original 1994 ARM610 version.  The only currently supported
configuration uses an ARMv4 StrongARM but still requires building
for ARMv3 because of the board design not supporting 16-bit
data access.

ARMv3 support has been removed in gcc-9, and the gcc-8 release
is already old but still supported for building the kernel.

The only set of machines that lacks support for 16-bit load/store
instructions (Alpha EV5 and older) was recently removed from
the kernel.

Since there is little hope of this being maintainable much
longer, plan to remove it in early 2027 while it is still expected
to mostly work.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-rpc/Kconfig | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-rpc/Kconfig b/arch/arm/mach-rpc/Kconfig
index 55f6d829b677..60b3823b690c 100644
--- a/arch/arm/mach-rpc/Kconfig
+++ b/arch/arm/mach-rpc/Kconfig
@@ -1,5 +1,5 @@
 config ARCH_RPC
-	bool "RiscPC"
+	bool "RiscPC (DEPRECATED)"
 	depends on ARCH_MULTI_V4 && !(ARCH_MULTI_V4T || ARCH_MULTI_V5)
 	depends on !(ARCH_FOOTBRIDGE || ARCH_SA1100 || ARCH_MOXART || ARCH_GEMINI)
 	depends on !CC_IS_CLANG && GCC_VERSION < 90100 && GCC_VERSION >= 60000
@@ -19,3 +19,6 @@ config ARCH_RPC
 	help
 	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
 	  CD-ROM interface, serial and parallel port, and the floppy drive.
+
+	  Support for these machines will go away in 2027,
+	  unless there are any remaining users that speak up.
-- 
2.39.5

[PATCH v2 16/19] ARM: mark footbridge as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Along with RiscPC and SA1100, these are the last remaining Intel StrongARM
machines. The Corel NetWinder used to be particular popular in the late
1990s, but was discontinued during the bankruptcy of rebel.com in 2001.
The other machine is the DEC (later Intel) EBSA285 evaluation board that
was made in small numbers in 1997 for software developers.

The footbridge/netwinder platform was the main target for the first Debian
2.0 "Hamm" release on the Arm architecture back in 1998, but was dropped
in Debian 6.0 "Squeeze" in 2011, which only supported ARMv4T and higher
with the EABI based ports as ARMv4 hardware had fallen already out of
use by that time.

Link: http://netwinder.org/
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralph Siemsen <ralph.siemsen@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-footbridge/Kconfig | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-footbridge/Kconfig b/arch/arm/mach-footbridge/Kconfig
index 78189997caa1..96a74d447028 100644
--- a/arch/arm/mach-footbridge/Kconfig
+++ b/arch/arm/mach-footbridge/Kconfig
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig ARCH_FOOTBRIDGE
-	bool "FootBridge Implementations"
+	bool "FootBridge Implementations (DEPRECATED)"
 	depends on ARCH_MULTI_V4 && !(ARCH_MULTI_V4T || ARCH_MULTI_V5)
 	depends on !(ARCH_MOXART || ARCH_GEMINI || ARCH_SA1100)
 	depends on ATAGS
@@ -12,7 +12,10 @@ menuconfig ARCH_FOOTBRIDGE
 	select NEED_MACH_MEMORY_H
 	help
 	  Support for systems based on the DC21285 companion chip
-	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
+	  ("FootBridge"), used in the EBSA285 and the Rebel NetWinder.
+
+	  Support for these machines will go away in 2027,
+	  unless there are any remaining users that speak up.
 
 if ARCH_FOOTBRIDGE
 
-- 
2.39.5

[PATCH v2 17/19] ARM: mark Cortex-M3/M4/M7 based boards as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The Cortex-M3/M4/M7 cores were designed as a replacement for the earlier
ARM7TDMI and ARM9TDMI microarchitectures used in older microcontrollers.

At the moment, Linux can run these cores either when they are integrated
into a larger SoC, or as standalone microcontrollers. While there was
a lot of development work going into Cortex-M support from 2011 to 2016,
this largely stopped when it became clear that Zephyr and other RTOS
had taken over that market. To date, the only Cortex-M based based
microcontroller boards supported upstream are reference implementations.

Schedule these for removal after the next LTS kernel, so if any users
remain that want to update their kernels, they can stay on that
version for a few years before having to maintain the platform support
out of tree.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/Kconfig            |  8 ++++++--
 arch/arm/mach-at91/Kconfig  |  4 +++-
 arch/arm/mach-imx/Kconfig   |  4 +++-
 arch/arm/mach-stm32/Kconfig | 14 ++++++++------
 4 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e2bdf2591c10..5adccaed7d01 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -471,7 +471,7 @@ source "arch/arm/mach-zynq/Kconfig"
 
 # ARMv7-M architecture
 config ARCH_LPC18XX
-	bool "NXP LPC18xx/LPC43xx"
+	bool "NXP LPC18xx/LPC43xx (DEPRECATED)"
 	depends on ARM_SINGLE_ARMV7M
 	select ARCH_HAS_RESET_CONTROLLER
 	select ARM_AMBA
@@ -481,8 +481,10 @@ config ARCH_LPC18XX
 	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
 	  high performance microcontrollers.
 
+	  This platform is scheduled for removal in early 2027
+
 config ARCH_MPS2
-	bool "ARM MPS2 platform"
+	bool "ARM MPS2 platform (DEPRECATED)"
 	depends on ARM_SINGLE_ARMV7M
 	select ARM_AMBA
 	select CLKSRC_MPS2
@@ -493,6 +495,8 @@ config ARCH_MPS2
 	  Please, note that depends which Application Note is used memory map
 	  for the platform may vary, so adjustment of RAM base might be needed.
 
+	  This platform is scheduled for removal in early 2027
+
 # Definitions to make life easier
 config ARCH_ACORN
 	bool
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index c5ef27e3cd8f..cb0e3ff8e0ca 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -15,13 +15,15 @@ menuconfig ARCH_AT91
 
 if ARCH_AT91
 config SOC_SAMV7
-	bool "SAM Cortex-M7 family" if ARM_SINGLE_ARMV7M
+	bool "SAM Cortex-M7 family (DEPRECATED)" if ARM_SINGLE_ARMV7M
 	select COMMON_CLK_AT91
 	select PINCTRL_AT91
 	help
 	  Select this if you are using an SoC from Microchip's SAME7, SAMS7 or SAMV7
 	  families.
 
+	  This platform is scheduled for removal in early 2027
+
 config SOC_SAMA5D2
 	bool "SAMA5D2 family"
 	depends on ARCH_MULTI_V7
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index f85a5f8c0a58..3f0521c652cb 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -219,12 +219,14 @@ config SOC_IMX7ULP
 	  This enables support for Freescale i.MX7 Ultra Low Power processor.
 
 config SOC_IMXRT
-	bool "i.MXRT support"
+	bool "i.MXRT support (DEPRECATED)"
 	depends on ARM_SINGLE_ARMV7M
 	select ARMV7M_SYSTICK if ARM_SINGLE_ARMV7M
 	help
 	  This enables support for Freescale i.MXRT Crossover processor.
 
+	  This platform is scheduled for removal in early 2027
+
 config SOC_VF610
 	bool "Vybrid Family VF610 support"
 	select ARM_GIC if ARCH_MULTI_V7
diff --git a/arch/arm/mach-stm32/Kconfig b/arch/arm/mach-stm32/Kconfig
index 630b992f32b1..4ac3384e397a 100644
--- a/arch/arm/mach-stm32/Kconfig
+++ b/arch/arm/mach-stm32/Kconfig
@@ -14,30 +14,32 @@ menuconfig ARCH_STM32
 	select STM32_EXTI if ARM_SINGLE_ARMV7M
 	select STM32_FIREWALL
 	help
-	  Support for STMicroelectronics STM32 processors.
+	  Support for STMicroelectronics STM32MP1 processors using Cortex-A7
+	  cores. Note that support for the earlier Cortex-M based variants
+	  is deprecated and scheduled for removal in early 2027.
 
 if ARCH_STM32
 
 if ARM_SINGLE_ARMV7M
 
 config MACH_STM32F429
-	bool "STMicroelectronics STM32F429"
+	bool "STMicroelectronics STM32F429 (DEPRECATED)"
 	default y
 
 config MACH_STM32F469
-	bool "STMicroelectronics STM32F469"
+	bool "STMicroelectronics STM32F469 (DEPRECATED)"
 	default y
 
 config MACH_STM32F746
-	bool "STMicroelectronics STM32F746"
+	bool "STMicroelectronics STM32F746 (DEPRECATED)"
 	default y
 
 config MACH_STM32F769
-	bool "STMicroelectronics STM32F769"
+	bool "STMicroelectronics STM32F769 (DEPRECATED)"
 	default y
 
 config MACH_STM32H743
-	bool "STMicroelectronics STM32H743"
+	bool "STMicroelectronics STM32H743 (DEPRECATED)"
 	default y
 
 endif # ARMv7-M
-- 
2.39.5

[PATCH v2 18/19] ARM: mark axxia platform as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

The Axxia platform was initially upstream by Anders Berg for LSI and
later Avago, but this included only support for I2C and reset drivers,
while most of the interesting bits (network, pci, rapidio, usb, ...) or
the arm64 platform support were never merged.

The downstream kernel was maintained by Intel up to linux-5.15 when
the product line was discontinued. Known users include Nokia and
Ericsson, but both of them use kernels derived from the out-of-tree
drivers rather than the upstream version, and will be able to continue
doing that even when the rudimentary mainline support is gone.

Mark it as deprecated for removal after the next LTS kernel.

Link: https://github.com/axxia/linux-yocto
Cc: Stefan Wiehler <stefan.wiehler@nokia.com>
Cc: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-axxia/Kconfig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-axxia/Kconfig b/arch/arm/mach-axxia/Kconfig
index d3eae6037913..f773a66c1402 100644
--- a/arch/arm/mach-axxia/Kconfig
+++ b/arch/arm/mach-axxia/Kconfig
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 config ARCH_AXXIA
-	bool "LSI Axxia platforms"
+	bool "LSI Axxia platforms (DEPRECATED)"
 	depends on ARCH_MULTI_V7 && ARM_LPAE
 	select ARM_AMBA
 	select ARM_GIC
@@ -13,3 +13,5 @@ config ARCH_AXXIA
 
 	  The LSI Axxia platforms require a Flattened Device Tree to be passed
 	  to the kernel.
+
+	  This platform is scheduled for removal in early 2027
-- 
2.39.5

[PATCH v2 19/19] ARM: mark mv78xx0 support as deprecated

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Only one machine remains supported and was kept in 2022 for the
Debian_on_Buffalo project that was still using this, with plans to
convert it to devicetree.

The conversion never happened, and Debian_on_Buffalo does not provide
kernels later than linux-6.1, so it is unlikely to still be useful
for a DT conversion in the future.

Mark the platform for deprecation after the next LTS kernel, which
should give any remaining users a few more years of bugfixes.

Link: https://lore.kernel.org/all/20221019150410.3851944-6-arnd@kernel.org/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/mach-mv78xx0/Kconfig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mv78xx0/Kconfig b/arch/arm/mach-mv78xx0/Kconfig
index 670e6587827e..98b35f5d05ba 100644
--- a/arch/arm/mach-mv78xx0/Kconfig
+++ b/arch/arm/mach-mv78xx0/Kconfig
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig ARCH_MV78XX0
-	bool "Marvell MV78xx0"
+	bool "Marvell MV78xx0 (DEPRECATED)"
 	depends on ARCH_MULTI_V5
 	depends on CPU_LITTLE_ENDIAN
 	depends on ATAGS
@@ -14,6 +14,8 @@ menuconfig ARCH_MV78XX0
 	  Support for the following Marvell MV78xx0 series SoCs:
 	  MV781x0, MV782x0.
 
+	  This platform is scheduled for removal in early 2027.
+
 if ARCH_MV78XX0
 
 config MACH_TERASTATION_WXL
-- 
2.39.5

Re: [PATCH v2 06/19] ARM: mark CPU_ENDIAN_BE8 as deprecated

[Ethan Nelson-Moore]

Hi, Arnd,

On Wed, Jul 1, 2026 at 2:25 PM Arnd Bergmann <arnd@kernel.org> wrote:
> Following the deprecation of big-endian ARMv8 mode in arch/arm64 in commit
> 1cf89b6bf660 ("arm64: Kconfig: Make CPU_BIG_ENDIAN depend on BROKEN"),
> this does the same for ARMv7 (and v6), leaving the code around but
> disabled by default: There are no known products that make use of this
> mode any more, and it only hangs around for testing that it still works.

Nice! Getting rid of ARM big-endian support is long overdue in my
opinion. The patch looks good to me, although see below for a couple
minor questions.

> At the moment, there are no known bugs with big-endian ARMv7 mode, but
> it does break occasionally and require someone to fix it.  By marking
> the code as 'depends on BROKEN' now, it will no longer be covered by CI
> testing. If any users remain, they can keep patching out the dependency
> but are more likely to run into regressions.
>
> The big-endian ARMv5 support (CONFIG_CPU_ENDIAN_BE32) in contrast is
> still used on Intel IXP4xx platform, and is the only currently supported
> mode there, so this one can still be enabled.

If IXP4xx is the only known remaining user, would it make sense for
CPU_BIG_ENDIAN to instead depend on ARCH_IXP4XX || BROKEN? Is BE32
mode known to work correctly on any other platforms?

Ethan

Re: [PATCH v2 04/19] ARM: deprecate support for ARM1136r0

[Vladimir Zapolskiy]

On 7/2/26 00:23, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> This CPU revision remains a special case as it is now incompatible
> with CONFIG_SMP. Only the Nokia N8x0 is used in practice, and even
> that one is fairly rare these days, so let's plan to remove all of
> them after the 2026 LTS kernel release.
> 
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>   arch/arm/mach-imx/Kconfig       |  5 ++++-
>   arch/arm/mach-omap2/Kconfig     | 15 ++++++++++++---
>   arch/arm/mach-versatile/Kconfig |  5 ++++-
>   arch/arm/mm/Kconfig             |  2 ++
>   4 files changed, 22 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
> index 041e73ad203a..f85a5f8c0a58 100644
> --- a/arch/arm/mach-imx/Kconfig
> +++ b/arch/arm/mach-imx/Kconfig
> @@ -40,13 +40,16 @@ if ARCH_MULTI_V6
>   comment "ARM1136 platforms"
>   
>   config SOC_IMX31
> -	bool "i.MX31 support"
> +	bool "i.MX31 support (DEPRECATED)"
>   	depends on !SMP
>   	select CPU_ARM1136R0
>   	select MXC_AVIC
>   	help
>   	  This enables support for Freescale i.MX31 processor
>   
> +	  This SoC is scheduled for removal in early 2027,
> +	  since it uses the ARM1136r0 CPU revision.
> +

Acked-by: Vladimir Zapolskiy <vz@mleia.com> # Freescale i.MX31

It's a nice SoC, long time ago its watchdog driver was broken in upstream
and never got fixed unfortunately...

>   config SOC_IMX35
>   	bool "i.MX35 support"
>   	select CPU_ARM1136R1
> diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
> index 13987ffbba00..79f8afe3a6bf 100644
> --- a/arch/arm/mach-omap2/Kconfig
> +++ b/arch/arm/mach-omap2/Kconfig
> @@ -207,18 +207,24 @@ comment "OMAP Core Type"
>   	depends on ARCH_OMAP2
>   
>   config SOC_OMAP2420
> -	bool "OMAP2420 support"
> +	bool "OMAP2420 support (DEPRECATED)"
>   	depends on ARCH_OMAP2
>   	default y
>   	select OMAP_DM_SYSTIMER
>   	select OMAP_DM_TIMER
>   	select SOC_HAS_OMAP2_SDRC
> +	help
> +	  This SoC is scheduled for removal in early 2027,
> +	  since it uses the ARM1136r0 CPU revision.
>   
>   config SOC_OMAP2430
> -	bool "OMAP2430 support"
> +	bool "OMAP2430 support (DEPRECATED)"
>   	depends on ARCH_OMAP2
>   	default y
>   	select SOC_HAS_OMAP2_SDRC
> +	help
> +	  This SoC is scheduled for removal in early 2027,
> +	  since it uses the ARM1136r0 CPU revision.
>   
>   config SOC_OMAP3430
>   	bool "OMAP3430 support"
> @@ -249,11 +255,14 @@ config MACH_NOKIA_N810_WIMAX
>   	bool
>   
>   config MACH_NOKIA_N8X0
> -	bool "Nokia N800/N810"
> +	bool "Nokia N800/N810 (DEPRECATED)"
>   	depends on SOC_OMAP2420
>   	default y
>   	select MACH_NOKIA_N810
>   	select MACH_NOKIA_N810_WIMAX
> +	help
> +	  This machine is scheduled for removal in early 2027,
> +	  since it uses the ARM1136r0 CPU revision.
>   
>   endmenu
>   
> diff --git a/arch/arm/mach-versatile/Kconfig b/arch/arm/mach-versatile/Kconfig
> index de42da7de8c8..1ee9b6608d71 100644
> --- a/arch/arm/mach-versatile/Kconfig
> +++ b/arch/arm/mach-versatile/Kconfig
> @@ -110,11 +110,14 @@ config INTEGRATOR_CM1026EJS
>   	select CPU_ARM1026
>   
>   config INTEGRATOR_CM1136JFS
> -	bool "Integrator/CM1136JF-S core module"
> +	bool "Integrator/CM1136JF-S core module (DEPRECATED)"
>   	depends on ARCH_INTEGRATOR_AP
>   	depends on ARCH_MULTI_V6
>   	depends on !SMP
>   	select CPU_ARM1136R0
> +	help
> +	  This machine is scheduled for removal in early 2027,
> +	  since it uses the ARM1136r0 CPU revision.
>   
>   config ARCH_INTEGRATOR_CP
>   	bool "Support Integrator/CP platform"
> diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
> index f3d71e89a31f..27010b9389ad 100644
> --- a/arch/arm/mm/Kconfig
> +++ b/arch/arm/mm/Kconfig
> @@ -410,6 +410,8 @@ config CPU_ARM1136R0
>   	help
>   	  These early revisions of ARM1136 lack support for the
>   	  ARMv6k extensions for multiprocessing.
> +	  Support for this revision is scheduled for removal
> +	  from the kernel in early 2027.
>   
>   config CPU_ARM1136R1
>   	bool

-- 
Best wishes,
Vladimir

Re: [PATCH v2 17/19] ARM: mark Cortex-M3/M4/M7 based boards as deprecated

[Vladimir Zapolskiy]

On 7/2/26 00:23, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The Cortex-M3/M4/M7 cores were designed as a replacement for the earlier
> ARM7TDMI and ARM9TDMI microarchitectures used in older microcontrollers.
> 
> At the moment, Linux can run these cores either when they are integrated
> into a larger SoC, or as standalone microcontrollers. While there was
> a lot of development work going into Cortex-M support from 2011 to 2016,
> this largely stopped when it became clear that Zephyr and other RTOS
> had taken over that market. To date, the only Cortex-M based based
> microcontroller boards supported upstream are reference implementations.
> 
> Schedule these for removal after the next LTS kernel, so if any users
> remain that want to update their kernels, they can stay on that
> version for a few years before having to maintain the platform support
> out of tree.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>   arch/arm/Kconfig            |  8 ++++++--
>   arch/arm/mach-at91/Kconfig  |  4 +++-
>   arch/arm/mach-imx/Kconfig   |  4 +++-
>   arch/arm/mach-stm32/Kconfig | 14 ++++++++------
>   4 files changed, 20 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index e2bdf2591c10..5adccaed7d01 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -471,7 +471,7 @@ source "arch/arm/mach-zynq/Kconfig"
>   
>   # ARMv7-M architecture
>   config ARCH_LPC18XX
> -	bool "NXP LPC18xx/LPC43xx"
> +	bool "NXP LPC18xx/LPC43xx (DEPRECATED)"
>   	depends on ARM_SINGLE_ARMV7M
>   	select ARCH_HAS_RESET_CONTROLLER
>   	select ARM_AMBA
> @@ -481,8 +481,10 @@ config ARCH_LPC18XX
>   	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
>   	  high performance microcontrollers.
>   
> +	  This platform is scheduled for removal in early 2027
> +

Acked-by: Vladimir Zapolskiy <vz@mleia.com> # NXP LPC18xx/LPC43xx

>   config ARCH_MPS2
> -	bool "ARM MPS2 platform"
> +	bool "ARM MPS2 platform (DEPRECATED)"
>   	depends on ARM_SINGLE_ARMV7M
>   	select ARM_AMBA
>   	select CLKSRC_MPS2
> @@ -493,6 +495,8 @@ config ARCH_MPS2
>   	  Please, note that depends which Application Note is used memory map
>   	  for the platform may vary, so adjustment of RAM base might be needed.
>   
> +	  This platform is scheduled for removal in early 2027
> +
>   # Definitions to make life easier
>   config ARCH_ACORN
>   	bool
> diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
> index c5ef27e3cd8f..cb0e3ff8e0ca 100644
> --- a/arch/arm/mach-at91/Kconfig
> +++ b/arch/arm/mach-at91/Kconfig
> @@ -15,13 +15,15 @@ menuconfig ARCH_AT91
>   
>   if ARCH_AT91
>   config SOC_SAMV7
> -	bool "SAM Cortex-M7 family" if ARM_SINGLE_ARMV7M
> +	bool "SAM Cortex-M7 family (DEPRECATED)" if ARM_SINGLE_ARMV7M
>   	select COMMON_CLK_AT91
>   	select PINCTRL_AT91
>   	help
>   	  Select this if you are using an SoC from Microchip's SAME7, SAMS7 or SAMV7
>   	  families.
>   
> +	  This platform is scheduled for removal in early 2027
> +
>   config SOC_SAMA5D2
>   	bool "SAMA5D2 family"
>   	depends on ARCH_MULTI_V7
> diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
> index f85a5f8c0a58..3f0521c652cb 100644
> --- a/arch/arm/mach-imx/Kconfig
> +++ b/arch/arm/mach-imx/Kconfig
> @@ -219,12 +219,14 @@ config SOC_IMX7ULP
>   	  This enables support for Freescale i.MX7 Ultra Low Power processor.
>   
>   config SOC_IMXRT
> -	bool "i.MXRT support"
> +	bool "i.MXRT support (DEPRECATED)"
>   	depends on ARM_SINGLE_ARMV7M
>   	select ARMV7M_SYSTICK if ARM_SINGLE_ARMV7M
>   	help
>   	  This enables support for Freescale i.MXRT Crossover processor.
>   
> +	  This platform is scheduled for removal in early 2027
> +
>   config SOC_VF610
>   	bool "Vybrid Family VF610 support"
>   	select ARM_GIC if ARCH_MULTI_V7
> diff --git a/arch/arm/mach-stm32/Kconfig b/arch/arm/mach-stm32/Kconfig
> index 630b992f32b1..4ac3384e397a 100644
> --- a/arch/arm/mach-stm32/Kconfig
> +++ b/arch/arm/mach-stm32/Kconfig
> @@ -14,30 +14,32 @@ menuconfig ARCH_STM32
>   	select STM32_EXTI if ARM_SINGLE_ARMV7M
>   	select STM32_FIREWALL
>   	help
> -	  Support for STMicroelectronics STM32 processors.
> +	  Support for STMicroelectronics STM32MP1 processors using Cortex-A7
> +	  cores. Note that support for the earlier Cortex-M based variants
> +	  is deprecated and scheduled for removal in early 2027.
>   
>   if ARCH_STM32
>   
>   if ARM_SINGLE_ARMV7M
>   
>   config MACH_STM32F429
> -	bool "STMicroelectronics STM32F429"
> +	bool "STMicroelectronics STM32F429 (DEPRECATED)"
>   	default y
>   
>   config MACH_STM32F469
> -	bool "STMicroelectronics STM32F469"
> +	bool "STMicroelectronics STM32F469 (DEPRECATED)"
>   	default y
>   
>   config MACH_STM32F746
> -	bool "STMicroelectronics STM32F746"
> +	bool "STMicroelectronics STM32F746 (DEPRECATED)"
>   	default y
>   
>   config MACH_STM32F769
> -	bool "STMicroelectronics STM32F769"
> +	bool "STMicroelectronics STM32F769 (DEPRECATED)"
>   	default y
>   
>   config MACH_STM32H743
> -	bool "STMicroelectronics STM32H743"
> +	bool "STMicroelectronics STM32H743 (DEPRECATED)"
>   	default y
>   
>   endif # ARMv7-M

-- 
Best wishes,
Vladimir

Re: [PATCH v2 05/19] ARM: turn CONFIG_ATAGS off by default

[Ethan Nelson-Moore]

Hi, Arnd,

Looks good to me, though I noticed a few small issues.

On Wed, Jul 1, 2026 at 2:24 PM Arnd Bergmann <arnd@kernel.org> wrote:
>
> From: Arnd Bergmann <arnd@arndb.de>
>
> Only a very small number of machines remain that rely on
> traditional board files with the ATAGS boot data instead
> of devicetree, and we have not accepted new ones for
> a decade.
>
> Most of the remaining ones are on their way out of the
> kernel, but the Kconfig option that controls ATAGS
> is still enabled by default.
>
> To reflect the actual status of ATAGS support and alert
> the remaining users of upstream and out-of-tree platforms
> with this, chanyge it to being default-disabled and
nit: change*

> add a dependency on CONFIG_EXPERT.
>
> The board specific defconfig files that rely on ATAGS
> are changed to turn on both EXPERT and ATAGS if they
> were not doing thath already, and the ones that explicitly
nit: that*

> turned it off before no longer need to.

> --- a/arch/arm/configs/stm32_defconfig
> +++ b/arch/arm/configs/stm32_defconfig
> @@ -20,7 +20,8 @@ CONFIG_ARCH_STM32=y
>  CONFIG_CPU_V7M_NUM_IRQ=240
>  CONFIG_SET_MEM_PARAM=y
>  CONFIG_DRAM_BASE=0x90000000
> -# CONFIG_ATAGS is not set
> +CONFIG_FLASH_MEM_BASE=0x08000000
> +CONFIG_FLASH_SIZE=0x00200000

^ These shouldn't be here - they depend on CPU_ARM740T || CPU_ARM946E
|| CPU_ARM940T, and they were manually removed previously. If they got
added when you did make savedefconfig, I'm not sure why, given that
dependency.

Reviewed-by: Ethan Nelson-Moore <enelsonmoore@gmail.com> (assuming
these issues are fixed)

Ethan

Re: [PATCH v2 18/19] ARM: mark axxia platform as deprecated

[Ethan Nelson-Moore]

Hi, Arnd,

On Wed, Jul 1, 2026 at 2:26 PM Arnd Bergmann <arnd@kernel.org> wrote:
> From: Arnd Bergmann <arnd@arndb.de>

All of these patches have this line at the beginning but were sent
from your kernel.org email - did something go wrong with git
send-email?

> The Axxia platform was initially upstream by Anders Berg for LSI and
> later Avago, but this included only support for I2C and reset drivers,
> while most of the interesting bits (network, pci, rapidio, usb, ...) or
> the arm64 platform support were never merged.

Given the incomplete state of this platform, removing it makes
complete sense to me.

>  config ARCH_AXXIA
> -       bool "LSI Axxia platforms"
> +       bool "LSI Axxia platforms (DEPRECATED)"
>         depends on ARCH_MULTI_V7 && ARM_LPAE

The dependency on LPAE reminded me of two other 32-bit ARM platforms
with lots of memory: Calxeda Midway and Highbank. Is anyone still
using those? Maybe they could be removed, since people seem to want to
remove highmem:
https://lwn.net/Articles/813201/
https://static.linaro.org/connect/lvc20/presentations/LVC20-106-0.pdf

>         select ARM_AMBA
>         select ARM_GIC
> @@ -13,3 +13,5 @@ config ARCH_AXXIA
>
>           The LSI Axxia platforms require a Flattened Device Tree to be passed
>           to the kernel.
> +
> +         This platform is scheduled for removal in early 2027
microscopic nit: missing period

Reviewed-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>



Ethan

Re: [PATCH v2 11/19] ARM: mark ARCH_DOVE as deprecated

[Ethan Nelson-Moore]

On Wed, Jul 1, 2026 at 2:25 PM Arnd Bergmann <arnd@kernel.org> wrote:
>
> From: Arnd Bergmann <arnd@arndb.de>
>
> The Marvell Armada 510 (Dove) platform is supported both as devicetree
> and atags/boardfile variants, with varying degrees of hardware support.
>
> Russell was the last known user of the board file version, and there
> are very few users overall. Unless Russell still needs this variant,
> let's remove after the next LTS kernel, leaving the CONFIG_MACH_DOVE
> variant with devicetree.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  arch/arm/mach-dove/Kconfig | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-dove/Kconfig b/arch/arm/mach-dove/Kconfig
> index 996888ffcfe7..f547120e223e 100644
> --- a/arch/arm/mach-dove/Kconfig
> +++ b/arch/arm/mach-dove/Kconfig
> @@ -1,6 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  menuconfig ARCH_DOVE
> -       bool "Marvell Dove" if ARCH_MULTI_V7
> +       bool "Marvell Dove (DEPRECATED)" if ARCH_MULTI_V7
>         depends on ATAGS
>         select CPU_PJ4
>         select GPIOLIB
> @@ -11,7 +11,11 @@ menuconfig ARCH_DOVE
>         select PM_GENERIC_DOMAINS if PM
>         select PCI_QUIRKS if PCI
>         help
> -         Support for the Marvell Dove SoC 88AP510
> +         Support for the Marvell Dove SoC 88AP510 using board files.
> +
> +         Support for this machine will be removed in early 2027, unless
> +         there is a strong reason to keep it. Users should migrate to
> +         the devicetree-enabled version (CONFIG_MACH_DOVE) instead.
>
>  if ARCH_DOVE
>
> --
> 2.39.5
>

Reviewed-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>