[PATCH 0/8] Make several Kconfig options depend on HAS_IOMEM

[PATCH 0/8] Make several Kconfig options depend on HAS_IOMEM

[Baoquan He]

In thread of one patch posting, LKP test robot reported some compiling
errors, paste the LKP report link here: 

https://lore.kernel.org/all/202306211329.ticOJCSv-lkp@intel.com/T/#u

In the config file, several Kconfig options are like below:
------
'# CONFIG_PCI is not set'
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_DMA_DECLARE_COHERENT=y
------

The reason is (words arranged from Niklas):
===
On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

So make several Kconfig options depend on HAS_IOMEM so that it won't
build in those driver code if PCI is unset.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/

Baoquan He (8):
  idmaengine: make FSL_EDMA and INTEL_IDMA64 depends on HAS_IOMEM
  char: xillybus: make XILLYBUS_OF depend on HAS_IOMEM
  misc: open-dice: make OPEN_DICE depend on HAS_IOMEM
  pcmcia : make PCMCIA depend on HAS_IOMEM
  net: altera-tse: make ALTERA_TSE depend on HAS_IOMEM
  irqchip/al-fic: make AL_FIC depend on HAS_IOMEM
  clk: fixed-mmio: make COMMON_CLK_FIXED_MMIO depend on HAS_IOMEM
  of: make OF_EARLY_FLATTREE depend on HAS_IOMEM

 drivers/char/xillybus/Kconfig       | 2 +-
 drivers/clk/Kconfig                 | 1 +
 drivers/dma/Kconfig                 | 2 ++
 drivers/irqchip/Kconfig             | 1 +
 drivers/misc/Kconfig                | 1 +
 drivers/net/ethernet/altera/Kconfig | 1 +
 drivers/of/Kconfig                  | 2 +-
 drivers/pcmcia/Kconfig              | 1 +
 8 files changed, 9 insertions(+), 2 deletions(-)

-- 
2.34.1

[PATCH 1/8] idmaengine: make FSL_EDMA and INTEL_IDMA64 depends on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let FSL_EDMA and INTEL_IDMA64 depend on HAS_IOMEM so that it
won't be built to cause below compiling error if PCI is unset.

--------
ERROR: modpost: "devm_platform_ioremap_resource" [drivers/dma/fsl-edma.ko] undefined!
ERROR: modpost: "devm_platform_ioremap_resource" [drivers/dma/idma64.ko] undefined!
--------

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org
---
 drivers/dma/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 644c188d6a11..08fdd0e2ed1b 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -211,6 +211,7 @@ config FSL_DMA
 config FSL_EDMA
 	tristate "Freescale eDMA engine support"
 	depends on OF
+	depends on HAS_IOMEM
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help
@@ -280,6 +281,7 @@ config IMX_SDMA
 
 config INTEL_IDMA64
 	tristate "Intel integrated DMA 64-bit support"
+	depends on HAS_IOMEM
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help
-- 
2.34.1

[PATCH 2/8] char: xillybus: make XILLYBUS_OF depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let XILLYBUS_OF depend on HAS_IOMEM so that it won't be built
to cause below compiling error if PCI is unset:

------
ERROR: modpost: "devm_platform_ioremap_resource" [drivers/char/xillybus/xillybus_of.ko] undefined!
------

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Eli Billauer <eli.billauer@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/char/xillybus/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/xillybus/Kconfig b/drivers/char/xillybus/Kconfig
index a8036dad437e..f51d533390a9 100644
--- a/drivers/char/xillybus/Kconfig
+++ b/drivers/char/xillybus/Kconfig
@@ -29,7 +29,7 @@ config XILLYBUS_PCIE
 
 config XILLYBUS_OF
 	tristate "Xillybus over Device Tree"
-	depends on OF && HAS_DMA
+	depends on OF && HAS_DMA && HAS_IOMEM
 	help
 	  Set to M if you want Xillybus to find its resources from the
 	  Open Firmware Flattened Device Tree. If the target is an embedded
-- 
2.34.1

[PATCH 3/8] misc: open-dice: make OPEN_DICE depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let OPEN_DICE depend on HAS_IOMEM so that it won't be built
to cause below compiling error if PCI is unset:

------
ERROR: modpost: "devm_memremap" [drivers/misc/open-dice.ko] undefined!
ERROR: modpost: "devm_memunmap" [drivers/misc/open-dice.ko] undefined!
------

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Derek Kiernan <derek.kiernan@amd.com>
Cc: Dragan Cvetic <dragan.cvetic@amd.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 75e427f124b2..cadd4a820c03 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -496,6 +496,7 @@ config HISI_HIKEY_USB
 config OPEN_DICE
 	tristate "Open Profile for DICE driver"
 	depends on OF_RESERVED_MEM
+	depends on HAS_IOMEM
 	help
 	  This driver exposes a DICE reserved memory region to userspace via
 	  a character device. The memory region contains Compound Device
-- 
2.34.1

[PATCH 4/8] pcmcia : make PCMCIA depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let depend PCMCIA on HAS_IOMEM so that it won't be built to
cause below compiling error if PCI is unset.

------
ld: drivers/pcmcia/cistpl.o: in function `set_cis_map':
cistpl.c:(.text+0x1202): undefined reference to `ioremap'
ld: cistpl.c:(.text+0x13b0): undefined reference to `iounmap'
ld: cistpl.c:(.text+0x14a6): undefined reference to `iounmap'
ld: cistpl.c:(.text+0x1544): undefined reference to `ioremap'
ld: drivers/pcmcia/cistpl.o: in function `release_cis_mem':
cistpl.c:(.text+0x3f14): undefined reference to `iounmap'
------

Besides, many other Kconfig option, e.g IPWIRELESS, PCMCIA_PCNET,
PCMCIA_FMVJ18X, PCMCIA_SMC91C92 which depends on PCMCIA also will
cause compiling error if enabled.

------
ERROR: modpost: "iounmap" [drivers/tty/ipwireless/ipwireless.ko] undefined!
ERROR: modpost: "ioremap" [drivers/tty/ipwireless/ipwireless.ko] undefined!

ERROR: modpost: "iounmap" [drivers/net/ethernet/8390/pcnet_cs.ko] undefined!
ERROR: modpost: "ioremap" [drivers/net/ethernet/8390/pcnet_cs.ko] undefined!
ERROR: modpost: "iounmap" [drivers/net/ethernet/fujitsu/fmvj18x_cs.ko] undefined!
ERROR: modpost: "ioremap" [drivers/net/ethernet/fujitsu/fmvj18x_cs.ko] undefined!
ERROR: modpost: "iounmap" [drivers/net/ethernet/smsc/smc91c92_cs.ko] undefined!
ERROR: modpost: "ioremap" [drivers/net/ethernet/smsc/smc91c92_cs.ko] undefined!
ERROR: modpost: "iounmap" [drivers/net/ethernet/xircom/xirc2ps_cs.ko] undefined!
ERROR: modpost: "ioremap" [drivers/net/ethernet/xircom/xirc2ps_cs.ko] undefined!
ERROR: modpost: "devm_ioremap" [drivers/net/ethernet/altera/altera_tse.ko] undefined!
ERROR: modpost: "iounmap" [drivers/net/arcnet/com90xx.ko] undefined!
------

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 drivers/pcmcia/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index e72419d7e72e..dddb235dd020 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -19,6 +19,7 @@ if PCCARD
 
 config PCMCIA
 	tristate "16-bit PCMCIA support"
+	depends on HAS_IOMEM
 	select CRC32
 	default y
 	help
-- 
2.34.1

[PATCH 5/8] net: altera-tse: make ALTERA_TSE depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let ALTERA_TSE depend on HAS_IOMEM so that it won't be built
to cause below compiling error if PCI is unset:

------
ERROR: modpost: "devm_ioremap" [drivers/net/ethernet/altera/altera_tse.ko] undefined!
------

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Joyce Ooi <joyce.ooi@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org

---
 drivers/net/ethernet/altera/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/altera/Kconfig b/drivers/net/ethernet/altera/Kconfig
index 17985319088c..4ef819a9a1ad 100644
--- a/drivers/net/ethernet/altera/Kconfig
+++ b/drivers/net/ethernet/altera/Kconfig
@@ -2,6 +2,7 @@
 config ALTERA_TSE
 	tristate "Altera Triple-Speed Ethernet MAC support"
 	depends on HAS_DMA
+	depends on HAS_IOMEM
 	select PHYLIB
 	select PHYLINK
 	select PCS_LYNX
-- 
2.34.1

Re: [PATCH 5/8] net: altera-tse: make ALTERA_TSE depend on HAS_IOMEM

[Simon Horman]

On Fri, Jul 07, 2023 at 09:58:49PM +0800, Baoquan He wrote:
> On s390 systems (aka mainframes), it has classic channel devices for
> networking and permanent storage that are currently even more common
> than PCI devices. Hence it could have a fully functional s390 kernel
> with CONFIG_PCI=n, then the relevant iomem mapping functions
> [including ioremap(), devm_ioremap(), etc.] are not available.
> 
> Here let ALTERA_TSE depend on HAS_IOMEM so that it won't be built
> to cause below compiling error if PCI is unset:
> 
> ------
> ERROR: modpost: "devm_ioremap" [drivers/net/ethernet/altera/altera_tse.ko] undefined!
> ------
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
> Signed-off-by: Baoquan He <bhe@redhat.com>


Reviewed-by: Simon Horman <simon.horman@corigine.com>
Tested-by: Simon Horman <simon.horman@corigine.com> # build-tested

I wonder if this should also have:

  Fixes: ed33ef648964 ("Altera TSE: Add Altera Ethernet Driver Makefile and Kconfig")

Re: [PATCH 5/8] net: altera-tse: make ALTERA_TSE depend on HAS_IOMEM

[Baoquan He]

On 07/11/23 at 06:17pm, Simon Horman wrote:
> On Fri, Jul 07, 2023 at 09:58:49PM +0800, Baoquan He wrote:
> > On s390 systems (aka mainframes), it has classic channel devices for
> > networking and permanent storage that are currently even more common
> > than PCI devices. Hence it could have a fully functional s390 kernel
> > with CONFIG_PCI=n, then the relevant iomem mapping functions
> > [including ioremap(), devm_ioremap(), etc.] are not available.
> > 
> > Here let ALTERA_TSE depend on HAS_IOMEM so that it won't be built
> > to cause below compiling error if PCI is unset:
> > 
> > ------
> > ERROR: modpost: "devm_ioremap" [drivers/net/ethernet/altera/altera_tse.ko] undefined!
> > ------
> > 
> > Reported-by: kernel test robot <lkp@intel.com>
> > Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
> > Signed-off-by: Baoquan He <bhe@redhat.com>
> 
> 
> Reviewed-by: Simon Horman <simon.horman@corigine.com>
> Tested-by: Simon Horman <simon.horman@corigine.com> # build-tested

Thanks, Simon.

> 
> I wonder if this should also have:
> 
>   Fixes: ed33ef648964 ("Altera TSE: Add Altera Ethernet Driver Makefile and Kconfig")

Agree, it's worth having Fixes tag.

[PATCH 6/8] irqchip/al-fic: make AL_FIC depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let AL_FIC depend on HAS_IOMEM so that it won't be built
to cause below compiling error if PCI is unset:

------
ld: drivers/irqchip/irq-al-fic.o: in function `al_fic_init_dt':
irq-al-fic.c:(.init.text+0x76): undefined reference to `of_iomap'
ld: irq-al-fic.c:(.init.text+0x4ce): undefined reference to `iounmap'
------

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <maz@kernel.org>
---
 drivers/irqchip/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 09e422da482f..4b9036c6d45b 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -89,6 +89,7 @@ config ALPINE_MSI
 config AL_FIC
 	bool "Amazon's Annapurna Labs Fabric Interrupt Controller"
 	depends on OF
+	depends on HAS_IOMEM
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 	help
-- 
2.34.1

[PATCH 7/8] clk: fixed-mmio: make COMMON_CLK_FIXED_MMIO depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let COMMON_CLK_FIXED_MMIO depend on HAS_IOMEM so that it won't
be built to cause below compiling error if PCI is unset:

------
ld: drivers/clk/clk-fixed-mmio.o: in function `fixed_mmio_clk_setup':
clk-fixed-mmio.c:(.text+0x5e): undefined reference to `of_iomap'
ld: clk-fixed-mmio.c:(.text+0xba): undefined reference to `iounmap'
------

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: linux-clk@vger.kernel.org
---
 drivers/clk/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 93f38a8178ba..6b3b424addab 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -444,6 +444,7 @@ config COMMON_CLK_BD718XX
 config COMMON_CLK_FIXED_MMIO
 	bool "Clock driver for Memory Mapped Fixed values"
 	depends on COMMON_CLK && OF
+	depends on HAS_IOMEM
 	help
 	  Support for Memory Mapped IO Fixed clocks
 
-- 
2.34.1

Re: [PATCH 7/8] clk: fixed-mmio: make COMMON_CLK_FIXED_MMIO depend on HAS_IOMEM

[Stephen Boyd]

Quoting Baoquan He (2023-07-07 06:58:51)
> On s390 systems (aka mainframes), it has classic channel devices for
> networking and permanent storage that are currently even more common
> than PCI devices. Hence it could have a fully functional s390 kernel
> with CONFIG_PCI=n, then the relevant iomem mapping functions
> [including ioremap(), devm_ioremap(), etc.] are not available.
> 
> Here let COMMON_CLK_FIXED_MMIO depend on HAS_IOMEM so that it won't
> be built to cause below compiling error if PCI is unset:
> 
> ------

Applied to clk-fixes

[PATCH 8/8] of: make OF_EARLY_FLATTREE depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

In LKP error report at below on s390:
------
ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory':
coherent.c:(.text+0x102): undefined reference to `memremap'
ld: coherent.c:(.text+0x226): undefined reference to `memunmap'
ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory':
coherent.c:(.text+0x8b8): undefined reference to `memunmap'
ld: kernel/dma/coherent.o: in function `dma_release_coherent_memory':
coherent.c:(.text+0x9aa): undefined reference to `memunmap'
------

In the config file, several Kconfig options are:
------
'# CONFIG_PCI is not set'
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_DMA_DECLARE_COHERENT=y
------

So, enabling OF_EARLY_FLATTREE will select DMA_DECLARE_COHERENT
and cause above building errors even though they are not needed
because CONFIG_PCI is disabled.

Here let OF_EARLY_FLATTREE depend on HAS_IOMEM so that it won't
be built to cause compiling error if PCI is unset.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: devicetree@vger.kernel.org
---
 drivers/of/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index e40f10bf2ba4..da9826accb1b 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -55,7 +55,7 @@ config OF_FLATTREE
 
 config OF_EARLY_FLATTREE
 	bool
-	select DMA_DECLARE_COHERENT if HAS_DMA
+	select DMA_DECLARE_COHERENT if HAS_DMA && HAS_IOMEM
 	select OF_FLATTREE
 
 config OF_PROMTREE
-- 
2.34.1

Re: [PATCH 8/8] of: make OF_EARLY_FLATTREE depend on HAS_IOMEM

[Rob Herring]

On Fri, 07 Jul 2023 21:58:52 +0800, Baoquan He wrote:
> On s390 systems (aka mainframes), it has classic channel devices for
> networking and permanent storage that are currently even more common
> than PCI devices. Hence it could have a fully functional s390 kernel
> with CONFIG_PCI=n, then the relevant iomem mapping functions
> [including ioremap(), devm_ioremap(), etc.] are not available.
> 
> In LKP error report at below on s390:
> ------
> ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory':
> coherent.c:(.text+0x102): undefined reference to `memremap'
> ld: coherent.c:(.text+0x226): undefined reference to `memunmap'
> ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory':
> coherent.c:(.text+0x8b8): undefined reference to `memunmap'
> ld: kernel/dma/coherent.o: in function `dma_release_coherent_memory':
> coherent.c:(.text+0x9aa): undefined reference to `memunmap'
> ------
> 
> In the config file, several Kconfig options are:
> ------
> '# CONFIG_PCI is not set'
> CONFIG_OF_EARLY_FLATTREE=y
> CONFIG_DMA_DECLARE_COHERENT=y
> ------
> 
> So, enabling OF_EARLY_FLATTREE will select DMA_DECLARE_COHERENT
> and cause above building errors even though they are not needed
> because CONFIG_PCI is disabled.
> 
> Here let OF_EARLY_FLATTREE depend on HAS_IOMEM so that it won't
> be built to cause compiling error if PCI is unset.
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/
> Signed-off-by: Baoquan He <bhe@redhat.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Frank Rowand <frowand.list@gmail.com>
> Cc: devicetree@vger.kernel.org
> ---
>  drivers/of/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Applied, thanks!

Re: (subset) [PATCH 0/8] Make several Kconfig options depend on HAS_IOMEM

[Vinod Koul]

On Fri, 07 Jul 2023 21:58:44 +0800, Baoquan He wrote:
> In thread of one patch posting, LKP test robot reported some compiling
> errors, paste the LKP report link here:
> 
> https://lore.kernel.org/all/202306211329.ticOJCSv-lkp@intel.com/T/#u
> 
> In the config file, several Kconfig options are like below:
> ------
> '# CONFIG_PCI is not set'
> CONFIG_OF_EARLY_FLATTREE=y
> CONFIG_DMA_DECLARE_COHERENT=y
> ------
> 
> [...]

Applied, thanks!

[1/8] idmaengine: make FSL_EDMA and INTEL_IDMA64 depends on HAS_IOMEM
      commit: 33629b377856fe5722a2a813b83d21e88281d474

Best regards,
-- 
~Vinod