* [PATCH 00/34] address all -Wunused-const warnings
@ 2024-04-03 8:06 Arnd Bergmann
2024-04-03 8:06 ` [PATCH 01/34] powerpc/fsl-soc: hide unused const variable Arnd Bergmann
2024-04-22 8:16 ` (subset) [PATCH 00/34] address all -Wunused-const warnings Michael Ellerman
0 siblings, 2 replies; 4+ messages in thread
From: Arnd Bergmann @ 2024-04-03 8:06 UTC (permalink / raw)
To: linux-kernel
Cc: Shyam Sundar S K, Heiko Stuebner, Rafael J. Wysocki, dri-devel,
Benjamin Tissoires, Srinivas Pandruvada, Christoph Hellwig,
linux-samsung-soc, linux-pm, linux-sound, Ian Abbott, linux-omap,
Trond Myklebust, Alex Elder, Tero Kristo, Xiang Chen,
Greg Kroah-Hartman, linux-usb, linux-wireless, linux-spi,
H Hartley Sweeten, Iyappan Subramanian, linux-crypto,
Andrew Morton, linux-trace-kernel, linux-hardening,
Alexandre Be lloni, Markuss Broks, Vaibhav Hiremath, linux-i2c,
Lars-Peter Clausen, Corey Minyard, Helge Deller, Lee Jones,
linux-clk, linux-rockchip, iommu, Yisen Zhuang, Len Brown,
Andi Shyti, Michael Hennerich, linux-kbuild, linux-arm-msm,
greybus-dev, linux-amlogic, linux-arm-kernel, Neil Armstrong,
Stephen Boyd, Jarkko Sakkinen, Anna Schumaker, linux-integrity,
alsa-devel, Jonathan Cameron, linux-efi, linux-iio, linux-fpga,
linux-fbdev, kasan-dev, Jiri Slaby, linux-rtc, Stanislaw Gruszka,
Masahiro Yamada, linux-staging, linux-input, Jacky Huang,
Kees Cook, Arnd Bergmann, Jiri Kosina, Robin Murphy,
Steven Rostedt, Nathan Chancellor, Mark Brown, Moritz Fischer,
openipmi-developer, linux-nfs, Martin K. Petersen,
Dmitry Torokhov, Sebastian Reichel, Peter Rosin, linux-stm32,
Tony Lindgren, Liviu Dudau, Alexandre Torgue, linux-ide
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] 4+ messages in thread
* [PATCH 01/34] powerpc/fsl-soc: hide unused const variable
2024-04-03 8:06 [PATCH 00/34] address all -Wunused-const warnings Arnd Bergmann
@ 2024-04-03 8:06 ` Arnd Bergmann
2024-04-03 8:19 ` Christophe Leroy
2024-04-22 8:16 ` (subset) [PATCH 00/34] address all -Wunused-const warnings Michael Ellerman
1 sibling, 1 reply; 4+ messages in thread
From: Arnd Bergmann @ 2024-04-03 8:06 UTC (permalink / raw)
To: linux-kernel, Michael Ellerman, Alexander Graf, Stuart Yoder, Scott Wood
Cc: Rob Herring, Arnd Bergmann, Aneesh Kumar K.V, Nicholas Piggin,
Uwe Kleine-König, Naveen N. Rao, linuxppc-dev
From: Arnd Bergmann <arnd@arndb.de>
vmpic_msi_feature is only used conditionally, which triggers a rare
-Werror=unused-const-variable= warning with gcc:
arch/powerpc/sysdev/fsl_msi.c:567:37: error: 'vmpic_msi_feature' defined but not used [-Werror=unused-const-variable=]
567 | static const struct fsl_msi_feature vmpic_msi_feature =
Hide this one in the same #ifdef as the reference so we can turn on
the warning by default.
Fixes: 305bcf26128e ("powerpc/fsl-soc: use CONFIG_EPAPR_PARAVIRT for hcalls")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/powerpc/sysdev/fsl_msi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index 8e6c84df4ca1..e205135ae1fe 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -564,10 +564,12 @@ static const struct fsl_msi_feature ipic_msi_feature = {
.msiir_offset = 0x38,
};
+#ifdef CONFIG_EPAPR_PARAVIRT
static const struct fsl_msi_feature vmpic_msi_feature = {
.fsl_pic_ip = FSL_PIC_IP_VMPIC,
.msiir_offset = 0,
};
+#endif
static const struct of_device_id fsl_of_msi_ids[] = {
{
--
2.39.2
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 01/34] powerpc/fsl-soc: hide unused const variable
2024-04-03 8:06 ` [PATCH 01/34] powerpc/fsl-soc: hide unused const variable Arnd Bergmann
@ 2024-04-03 8:19 ` Christophe Leroy
0 siblings, 0 replies; 4+ messages in thread
From: Christophe Leroy @ 2024-04-03 8:19 UTC (permalink / raw)
To: Arnd Bergmann, linux-kernel, Michael Ellerman, Alexander Graf,
Stuart Yoder, Scott Wood
Cc: Rob Herring, Arnd Bergmann, Nicholas Piggin, Aneesh Kumar K.V,
Uwe Kleine-König, Naveen N. Rao, linuxppc-dev
Le 03/04/2024 à 10:06, Arnd Bergmann a écrit :
> From: Arnd Bergmann <arnd@arndb.de>
>
> vmpic_msi_feature is only used conditionally, which triggers a rare
> -Werror=unused-const-variable= warning with gcc:
>
> arch/powerpc/sysdev/fsl_msi.c:567:37: error: 'vmpic_msi_feature' defined but not used [-Werror=unused-const-variable=]
> 567 | static const struct fsl_msi_feature vmpic_msi_feature =
>
> Hide this one in the same #ifdef as the reference so we can turn on
> the warning by default.
>
> Fixes: 305bcf26128e ("powerpc/fsl-soc: use CONFIG_EPAPR_PARAVIRT for hcalls")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
> ---
> arch/powerpc/sysdev/fsl_msi.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
> index 8e6c84df4ca1..e205135ae1fe 100644
> --- a/arch/powerpc/sysdev/fsl_msi.c
> +++ b/arch/powerpc/sysdev/fsl_msi.c
> @@ -564,10 +564,12 @@ static const struct fsl_msi_feature ipic_msi_feature = {
> .msiir_offset = 0x38,
> };
>
> +#ifdef CONFIG_EPAPR_PARAVIRT
> static const struct fsl_msi_feature vmpic_msi_feature = {
> .fsl_pic_ip = FSL_PIC_IP_VMPIC,
> .msiir_offset = 0,
> };
> +#endif
>
> static const struct of_device_id fsl_of_msi_ids[] = {
> {
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: (subset) [PATCH 00/34] address all -Wunused-const warnings
2024-04-03 8:06 [PATCH 00/34] address all -Wunused-const warnings Arnd Bergmann
2024-04-03 8:06 ` [PATCH 01/34] powerpc/fsl-soc: hide unused const variable Arnd Bergmann
@ 2024-04-22 8:16 ` Michael Ellerman
1 sibling, 0 replies; 4+ messages in thread
From: Michael Ellerman @ 2024-04-22 8:16 UTC (permalink / raw)
To: linux-kernel, Arnd Bergmann
Cc: , Shyam Sundar S K, Heiko Stuebner, Rafael J. Wysocki, dri-devel,
Benjamin Tissoires, Srinivas Pandruvada, Christoph Hellwig,
linux-samsung-soc, g.com, linux-pm, linux-sound, Ian Abbott,
linux-omap, Trond Myklebust, Alex Elder, Tero Kristo, Xiang Chen,
Greg Kroah-Hartman, linux-usb, linux-wireless, linux-spi,
H Hartley Sweeten, Iyappan Subramanian, linux-crypto,
Andrew Morton, linux-trace-kernel, linux-hardening,
Alexandre Belloni, Markuss Broks, Vaibhav Hiremath, linux-i2c,
Lars-Peter Clausen, Helge Deller, Lee Jones, linux-clk,
linux-rockchip, iommu, Yisen Zhuang, Len Brown, Andi Shyti,
Corey Minyard, linux-kbuild, linux-arm-msm, Michael Hennerich,
greybus-dev, org, linux-arm-kernel, Neil Armstrong, Stephen Boyd,
Jarkko Sakkinen, Anna Schumaker, linux-integrity, alsa-devel,
Jonathan Cameron, linux-efi, linux-iio, linux-fpga, linux-fbdev,
kasan-dev, linux-amlogic, linux-rtc, Stanislaw Gruszka,
Masahiro Yamada, linux-staging, Jiri Slaby, Jacky Huang,
Kees Cook, Arnd Bergmann, linux-input, Steven Rostedt,
Nathan Chancellor, Mark Brown, Moritz Fischer,
openipmi-developer, linux-nfs, Martin K. Petersen,
Dmitry Torokhov, Sebastian Reichel, netdev, Peter Rosin,
Tony Lindgren, Liviu Dudau, Alexandre Torgue, linux-ide,
Peter Huewe, Ard Biesheuvel, linux-leds, Herbert Xu, linux-scsi,
Vinod Koul, linux-stm32, linux-serial, Jakub Kicinski,
Masami Hiramatsu, Jiri Kosina, Kalle Valo, John Allen, eply.com,
Robin Murphy, Bjorn Andersson, Takashi Iwai, Krzysztof Kozlowski,
Damien Le Moal, dmaengine, linuxppc-dev
On Wed, 03 Apr 2024 10:06:18 +0200, Arnd Bergmann wrote:
> 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.
>
> [...]
Applied to powerpc/next.
[01/34] powerpc/fsl-soc: hide unused const variable
https://git.kernel.org/powerpc/c/01acaf3aa75e1641442cc23d8fe0a7bb4226efb1
cheers
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-04-22 8:46 UTC | newest]
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2024-04-03 8:06 ` [PATCH 01/34] powerpc/fsl-soc: hide unused const variable Arnd Bergmann
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