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From: Nathan Chancellor <nathan@kernel.org>
To: masahiroy@kernel.org, ndesaulniers@google.com
Cc: nicolas@fjasle.eu, trix@redhat.com, linux-kbuild@vger.kernel.org,
	llvm@lists.linux.dev, Nathan Chancellor <nathan@kernel.org>,
	kernel test robot <lkp@intel.com>,
	hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com,
	borntraeger@linux.ibm.com, svens@linux.ibm.com,
	linux-s390@vger.kernel.org
Subject: [PATCH 09/14] s390/vdso: Drop unused '-s' flag from KBUILD_AFLAGS_64
Date: Wed, 04 Jan 2023 12:54:26 -0700	[thread overview]
Message-ID: <20221228-drop-qunused-arguments-v1-9-658cbc8fc592@kernel.org> (raw)
In-Reply-To: <20221228-drop-qunused-arguments-v1-0-658cbc8fc592@kernel.org>

When clang's -Qunused-arguments is dropped from KBUILD_CPPFLAGS, it
warns that KBUILD_AFLAGS_64 contains '-s', which is a linking phase
option, so it is unused.

  clang-16: error: argument unused during compilation: '-s' [-Werror,-Wunused-command-line-argument]

There appears to be no equivalent for '-s' in GNU as; 'as --help' on
x86_64 notes that '-s' is ignored and 's390x-linux-gnu-as --help' makes
no mention of it whatsoever.

Just drop '-s' altogether, as it has been there since the introduction
of the vDSO, which means it is likely uneeded, given there would likely
have been a report by this point.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
Cc: hca@linux.ibm.com
Cc: gor@linux.ibm.com
Cc: agordeev@linux.ibm.com
Cc: borntraeger@linux.ibm.com
Cc: svens@linux.ibm.com
Cc: linux-s390@vger.kernel.org
---
 arch/s390/kernel/vdso64/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/kernel/vdso64/Makefile b/arch/s390/kernel/vdso64/Makefile
index 9e2b95a222a9..a2fe9383d452 100644
--- a/arch/s390/kernel/vdso64/Makefile
+++ b/arch/s390/kernel/vdso64/Makefile
@@ -22,7 +22,7 @@ KBUILD_AFLAGS += -DBUILD_VDSO
 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
 
 KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
-KBUILD_AFLAGS_64 += -m64 -s
+KBUILD_AFLAGS_64 += -m64
 
 KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
 KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin

-- 
2.39.0

  parent reply	other threads:[~2023-01-04 19:55 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-04 19:54 [PATCH 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Nathan Chancellor
2023-01-04 19:54 ` [PATCH 01/14] x86/boot/compressed: prefer cc-option for CFLAGS additions Nathan Chancellor
2023-01-04 19:54 ` [PATCH 02/14] MIPS: Always use -Wa,-msoft-float and eliminate GAS_HAS_SET_HARDFLOAT Nathan Chancellor
2023-01-09 21:18   ` Nick Desaulniers
2023-01-10  7:45   ` Philippe Mathieu-Daudé
2023-01-10  8:30   ` Thomas Bogendoerfer
2023-01-04 19:54 ` [PATCH 03/14] MIPS: Prefer cc-option for additions to cflags Nathan Chancellor
2023-01-09 21:21   ` Nick Desaulniers
2023-01-10  7:42   ` Philippe Mathieu-Daudé
2023-01-10  8:30   ` Thomas Bogendoerfer
2023-01-04 19:54 ` [PATCH 04/14] kbuild: Update assembler calls to use proper flags and language target Nathan Chancellor
2023-01-04 19:54 ` [PATCH 05/14] powerpc: Remove linker flag from KBUILD_AFLAGS Nathan Chancellor
2023-01-09 21:24   ` Nick Desaulniers
2023-01-04 19:54 ` [PATCH 06/14] powerpc/vdso: Remove unused '-s' flag from ASFLAGS Nathan Chancellor
2023-01-09 21:58   ` Nick Desaulniers
2023-01-09 22:15     ` Nathan Chancellor
2023-01-09 22:21       ` Nick Desaulniers
2023-01-09 22:23     ` Segher Boessenkool
2023-01-09 22:37       ` Nathan Chancellor
2023-01-09 22:47         ` Segher Boessenkool
2023-01-09 23:14       ` Nick Desaulniers
2023-01-10  0:51         ` Nathan Chancellor
2023-01-10 11:45           ` Segher Boessenkool
2023-01-10 15:02             ` Nathan Chancellor
     [not found]     ` <20230109222337.GM25951__25255.3859770828$1673303520$gmane$org@gate.crashing.org>
2023-01-10  0:22       ` Andreas Schwab
2023-01-10  0:43         ` Segher Boessenkool
2023-01-04 19:54 ` [PATCH 07/14] powerpc/vdso: Improve linker flags Nathan Chancellor
2023-01-09 22:08   ` Nick Desaulniers
2023-01-09 22:15     ` Nathan Chancellor
2023-01-04 19:54 ` [PATCH 08/14] powerpc/vdso: Remove an unsupported flag from vgettimeofday-32.o with clang Nathan Chancellor
2023-01-09 22:12   ` Nick Desaulniers
2023-01-09 22:38     ` Nathan Chancellor
2023-01-09 23:16       ` Nick Desaulniers
2023-01-04 19:54 ` Nathan Chancellor [this message]
2023-01-05  7:27   ` [PATCH 09/14] s390/vdso: Drop unused '-s' flag from KBUILD_AFLAGS_64 Sven Schnelle
2023-01-04 19:54 ` [PATCH 10/14] s390/vdso: Drop '-shared' from KBUILD_CFLAGS_64 Nathan Chancellor
2023-01-05  7:31   ` Sven Schnelle
2023-01-04 19:54 ` [PATCH 11/14] s390/purgatory: Remove unused '-MD' and unnecessary '-c' flags Nathan Chancellor
2023-01-05  7:33   ` Sven Schnelle
2023-01-04 19:54 ` [PATCH 12/14] drm/amd/display: Do not add '-mhard-float' to dml_ccflags for clang Nathan Chancellor
2023-01-05 14:21   ` Alex Deucher
2023-01-04 19:54 ` [PATCH 13/14] kbuild: Turn a couple more of clang's unused option warnings into errors Nathan Chancellor
2023-01-09 22:15   ` Nick Desaulniers
2023-01-04 19:54 ` [PATCH 14/14] kbuild: Stop using '-Qunused-arguments' with clang Nathan Chancellor
2023-01-09 22:17   ` Nick Desaulniers
2023-01-05  8:00 ` [PATCH 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Heiko Carstens

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