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* [PATCH 00/34] address all -Wunused-const warnings
@ 2024-04-03  8:06 Arnd Bergmann
  2024-04-03  8:06 ` [PATCH 34/34] kbuild: always enable -Wunused-const-variable Arnd Bergmann
                   ` (4 more replies)
  0 siblings, 5 replies; 8+ messages in thread
From: Arnd Bergmann @ 2024-04-03  8:06 UTC (permalink / raw)
  To: linux-kernel
  Cc: Arnd Bergmann, Michael Ellerman, Christophe Leroy, Damien Le Moal,
	Jiri Kosina, Greg Kroah-Hartman, Corey Minyard, Peter Huewe,
	Jarkko Sakkinen, Tero Kristo, Stephen Boyd, Ian Abbott,
	H Hartley Sweeten, Srinivas Pandruvada, Len Brown,
	Rafael J. Wysocki, John Allen, Herbert Xu, Vinod Koul,
	Ard Biesheuvel, Bjorn Andersson, Moritz Fischer, Liviu Dudau,
	Benjamin Tissoires, Andi Shyti, Michael Hennerich, Peter Rosin,
	Lars-Peter Clausen, Jonathan Cameron, Dmitry Torokhov,
	Markuss Broks, Alexandre Torgue, Lee Jones, Jakub Kicinski,
	Shyam Sundar S K, Iyappan Subramanian, Yisen Zhuang,
	Stanislaw Gruszka, Kalle Valo, Sebastian Reichel, Tony Lindgren,
	Mark Brown, Alexandre Belloni, Xiang Chen, Martin K. Petersen,
	Neil Armstrong, Heiko Stuebner, Krzysztof Kozlowski,
	Vaibhav Hiremath, Alex Elder, Jiri Slaby, Jacky Huang,
	Helge Deller, Christoph Hellwig, Robin Murphy, Steven Rostedt,
	Masami Hiramatsu, Andrew Morton, Kees Cook, Trond Myklebust,
	Anna Schumaker, Masahiro Yamada, Nathan Chancellor, Takashi Iwai,
	linuxppc-dev, linux-ide, openipmi-developer, linux-integrity,
	linux-omap, linux-clk, linux-pm, linux-crypto, dmaengine,
	linux-efi, linux-arm-msm, linux-fpga, dri-devel, linux-input,
	linux-i2c, linux-iio, linux-stm32, linux-arm-kernel, netdev,
	linux-leds, linux-wireless, linux-rtc, linux-scsi, linux-spi,
	linux-amlogic, linux-rockchip, linux-samsung-soc, greybus-dev,
	linux-staging, linux-serial, linux-usb, linux-fbdev, iommu,
	linux-trace-kernel, kasan-dev, linux-hardening, linux-nfs,
	linux-kbuild, alsa-devel, linux-sound

From: Arnd Bergmann <arnd@arndb.de>

Compilers traditionally warn for unused 'static' variables, but not
if they are constant. The reason here is a custom for C++ programmers
to define named constants as 'static const' variables in header files
instead of using macros or enums.

In W=1 builds, we get warnings only static const variables in C
files, but not in headers, which is a good compromise, but this still
produces warning output in at least 30 files. These warnings are
almost all harmless, but also trivial to fix, and there is no
good reason to warn only about the non-const variables being unused.

I've gone through all the files that I found using randconfig and
allmodconfig builds and created patches to avoid these warnings,
with the goal of retaining a clean build once the option is enabled
by default.

Unfortunately, there is one fairly large patch ("drivers: remove
incorrect of_match_ptr/ACPI_PTR annotations") that touches
34 individual drivers that all need the same one-line change.
If necessary, I can split it up by driver or by subsystem,
but at least for reviewing I would keep it as one piece for
the moment.

Please merge the individual patches through subsystem trees.
I expect that some of these will have to go through multiple
revisions before they are picked up, so anything that gets
applied early saves me from resending.

        Arnd

Arnd Bergmann (31):
  powerpc/fsl-soc: hide unused const variable
  ubsan: fix unused variable warning in test module
  platform: goldfish: remove ACPI_PTR() annotations
  i2c: pxa: hide unused icr_bits[] variable
  3c515: remove unused 'mtu' variable
  tracing: hide unused ftrace_event_id_fops
  Input: synaptics: hide unused smbus_pnp_ids[] array
  power: rt9455: hide unused rt9455_boost_voltage_values
  efi: sysfb: don't build when EFI is disabled
  clk: ti: dpll: fix incorrect #ifdef checks
  apm-emulation: hide an unused variable
  sisfb: hide unused variables
  dma/congiguous: avoid warning about unused size_bytes
  leds: apu: remove duplicate DMI lookup data
  iio: ad5755: hook up of_device_id lookup to platform driver
  greybus: arche-ctrl: move device table to its right location
  lib: checksum: hide unused expected_csum_ipv6_magic[]
  sunrpc: suppress warnings for unused procfs functions
  comedi: ni_atmio: avoid warning for unused device_ids[] table
  iwlegacy: don't warn for unused variables with DEBUG_FS=n
  drm/komeda: don't warn for unused debugfs files
  firmware: qcom_scm: mark qcom_scm_qseecom_allowlist as __maybe_unused
  crypto: ccp - drop platform ifdef checks
  usb: gadget: omap_udc: remove unused variable
  isdn: kcapi: don't build unused procfs code
  cpufreq: intel_pstate: hide unused intel_pstate_cpu_oob_ids[]
  net: xgbe: remove extraneous #ifdef checks
  Input: imagis - remove incorrect ifdef checks
  sata: mv: drop unnecessary #ifdef checks
  ASoC: remove incorrect of_match_ptr/ACPI_PTR annotations
  spi: remove incorrect of_match_ptr annotations
  drivers: remove incorrect of_match_ptr/ACPI_PTR annotations
  kbuild: always enable -Wunused-const-variable

Krzysztof Kozlowski (1):
  Input: stmpe-ts - mark OF related data as maybe unused

 arch/powerpc/sysdev/fsl_msi.c                 |  2 +
 drivers/ata/sata_mv.c                         | 64 +++++++++----------
 drivers/char/apm-emulation.c                  |  5 +-
 drivers/char/ipmi/ipmb_dev_int.c              |  2 +-
 drivers/char/tpm/tpm_ftpm_tee.c               |  2 +-
 drivers/clk/ti/dpll.c                         | 10 ++-
 drivers/comedi/drivers/ni_atmio.c             |  2 +-
 drivers/cpufreq/intel_pstate.c                |  2 +
 drivers/crypto/ccp/sp-platform.c              | 14 +---
 drivers/dma/img-mdc-dma.c                     |  2 +-
 drivers/firmware/efi/Makefile                 |  3 +-
 drivers/firmware/efi/sysfb_efi.c              |  2 -
 drivers/firmware/qcom/qcom_scm.c              |  2 +-
 drivers/fpga/versal-fpga.c                    |  2 +-
 .../gpu/drm/arm/display/komeda/komeda_dev.c   |  8 ---
 drivers/hid/hid-google-hammer.c               |  6 +-
 drivers/i2c/busses/i2c-pxa.c                  |  2 +-
 drivers/i2c/muxes/i2c-mux-ltc4306.c           |  2 +-
 drivers/i2c/muxes/i2c-mux-reg.c               |  2 +-
 drivers/iio/dac/ad5755.c                      |  1 +
 drivers/input/mouse/synaptics.c               |  2 +
 drivers/input/touchscreen/imagis.c            |  4 +-
 drivers/input/touchscreen/stmpe-ts.c          |  2 +-
 drivers/input/touchscreen/wdt87xx_i2c.c       |  2 +-
 drivers/isdn/capi/Makefile                    |  3 +-
 drivers/isdn/capi/kcapi.c                     |  7 +-
 drivers/leds/leds-apu.c                       |  3 +-
 drivers/mux/adg792a.c                         |  2 +-
 drivers/net/ethernet/3com/3c515.c             |  3 -
 drivers/net/ethernet/amd/xgbe/xgbe-platform.c |  8 ---
 drivers/net/ethernet/apm/xgene-v2/main.c      |  2 +-
 drivers/net/ethernet/hisilicon/hns_mdio.c     |  2 +-
 drivers/net/wireless/intel/iwlegacy/4965-rs.c | 15 +----
 drivers/net/wireless/intel/iwlegacy/common.h  |  2 -
 drivers/platform/goldfish/goldfish_pipe.c     |  2 +-
 drivers/power/supply/rt9455_charger.c         |  2 +
 drivers/regulator/pbias-regulator.c           |  2 +-
 drivers/regulator/twl-regulator.c             |  2 +-
 drivers/regulator/twl6030-regulator.c         |  2 +-
 drivers/rtc/rtc-fsl-ftm-alarm.c               |  2 +-
 drivers/scsi/hisi_sas/hisi_sas_v1_hw.c        |  2 +-
 drivers/scsi/hisi_sas/hisi_sas_v2_hw.c        |  2 +-
 drivers/spi/spi-armada-3700.c                 |  2 +-
 drivers/spi/spi-img-spfi.c                    |  2 +-
 drivers/spi/spi-meson-spicc.c                 |  2 +-
 drivers/spi/spi-meson-spifc.c                 |  2 +-
 drivers/spi/spi-orion.c                       |  2 +-
 drivers/spi/spi-pic32-sqi.c                   |  2 +-
 drivers/spi/spi-pic32.c                       |  2 +-
 drivers/spi/spi-rockchip.c                    |  2 +-
 drivers/spi/spi-s3c64xx.c                     |  2 +-
 drivers/spi/spi-st-ssc4.c                     |  2 +-
 drivers/staging/greybus/arche-apb-ctrl.c      |  1 +
 drivers/staging/greybus/arche-platform.c      |  9 +--
 drivers/staging/pi433/pi433_if.c              |  2 +-
 drivers/tty/serial/amba-pl011.c               |  6 +-
 drivers/tty/serial/ma35d1_serial.c            |  2 +-
 drivers/usb/gadget/udc/omap_udc.c             | 10 +--
 drivers/video/fbdev/sis/init301.c             |  3 +-
 kernel/dma/contiguous.c                       |  2 +-
 kernel/trace/trace_events.c                   |  4 ++
 lib/checksum_kunit.c                          |  2 +
 lib/test_ubsan.c                              |  2 +-
 net/sunrpc/cache.c                            | 10 +--
 scripts/Makefile.extrawarn                    |  1 -
 sound/soc/atmel/sam9x5_wm8731.c               |  2 +-
 sound/soc/codecs/rt5514-spi.c                 |  2 +-
 sound/soc/qcom/lpass-sc7280.c                 |  2 +-
 sound/soc/samsung/aries_wm8994.c              |  2 +-
 69 files changed, 121 insertions(+), 169 deletions(-)

-- 
2.39.2

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Corey Minyard <minyard@acm.org>
Cc: Peter Huewe <peterhuewe@gmx.de>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Tero Kristo <kristo@kernel.org>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: John Allen <john.allen@amd.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Moritz Fischer <mdf@kernel.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Andi Shyti <andi.shyti@kernel.org>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Markuss Broks <markuss.broks@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Lee Jones <lee@kernel.org>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Cc: Iyappan Subramanian <iyappan@os.amperecomputing.com>
Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Stanislaw Gruszka <stf_xl@wp.pl>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Xiang Chen <chenxiang66@hisilicon.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Vaibhav Hiremath <hvaibhav.linux@gmail.com>
Cc: Alex Elder <elder@kernel.org>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Jacky Huang <ychuang3@nuvoton.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-ide@vger.kernel.org
Cc: openipmi-developer@lists.sourceforge.net
Cc: linux-integrity@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: linux-crypto@vger.kernel.org
Cc: dmaengine@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-fpga@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-input@vger.kernel.org
Cc: linux-i2c@vger.kernel.org
Cc: linux-iio@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: netdev@vger.kernel.org
Cc: linux-leds@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: linux-rtc@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: linux-spi@vger.kernel.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: greybus-dev@lists.linaro.org
Cc: linux-staging@lists.linux.dev
Cc: linux-serial@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: linux-fbdev@vger.kernel.org
Cc: iommu@lists.linux.dev
Cc: linux-trace-kernel@vger.kernel.org
Cc: kasan-dev@googlegroups.com
Cc: linux-hardening@vger.kernel.org
Cc: linux-nfs@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Cc: linux-sound@vger.kernel.org

^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2025-01-27 13:25 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-04-03  8:06 [PATCH 00/34] address all -Wunused-const warnings Arnd Bergmann
2024-04-03  8:06 ` [PATCH 34/34] kbuild: always enable -Wunused-const-variable Arnd Bergmann
2024-04-03  9:19   ` Andy Shevchenko
2024-04-03  9:26     ` Arnd Bergmann
2024-04-06  5:20 ` [PATCH 00/34] address all -Wunused-const warnings patchwork-bot+netdevbpf
2024-04-10  8:02 ` (subset) " Sebastian Reichel
2024-04-22  8:16 ` Michael Ellerman
2025-01-27 13:24 ` Andy Shevchenko

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