Messages in this thread Patch in this message | | | Date | Fri, 30 Nov 2018 01:59:47 -0800 | From | tip-bot for Nathan Chancellor <> | Subject | [tip:efi/core] efi/libstub: Disable some warnings for x86{,_64} |
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Commit-ID: 3db5e0ba8b8f4aee631d7ee04b7a11c56cfdc213 Gitweb: https://git.kernel.org/tip/3db5e0ba8b8f4aee631d7ee04b7a11c56cfdc213 Author: Nathan Chancellor <natechancellor@gmail.com> AuthorDate: Thu, 29 Nov 2018 18:12:26 +0100 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Fri, 30 Nov 2018 09:10:31 +0100
efi/libstub: Disable some warnings for x86{,_64}
When building the kernel with Clang, some disabled warnings appear because this Makefile overrides KBUILD_CFLAGS for x86{,_64}. Add them to this list so that the build is clean again.
-Wpointer-sign was disabled for the whole kernel before the beginning of Git history.
-Waddress-of-packed-member was disabled for the whole kernel and for the early boot code in these commits:
bfb38988c51e ("kbuild: clang: Disable 'address-of-packed-member' warning") 20c6c1890455 ("x86/boot: Disable the address-of-packed-member compiler warning").
-Wgnu was disabled for the whole kernel and for the early boot code in these commits:
61163efae020 ("kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang") 6c3b56b19730 ("x86/boot: Disable Clang warnings about GNU extensions").
[ mingo: Made the changelog more readable. ]
Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arend van Spriel <arend.vanspriel@broadcom.com> Cc: Bhupesh Sharma <bhsharma@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Eric Snowberg <eric.snowberg@oracle.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Jon Hunter <jonathanh@nvidia.com> Cc: Julien Thierry <julien.thierry@arm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: YiFei Zhu <zhuyifei1999@gmail.com> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20181129171230.18699-8-ard.biesheuvel@linaro.org Link: https://github.com/ClangBuiltLinux/linux/issues/112 Signed-off-by: Ingo Molnar <mingo@kernel.org> --- drivers/firmware/efi/libstub/Makefile | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index c51627660dbb..d9845099635e 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -9,7 +9,10 @@ cflags-$(CONFIG_X86_32) := -march=i386 cflags-$(CONFIG_X86_64) := -mcmodel=small cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \ -fPIC -fno-strict-aliasing -mno-red-zone \ - -mno-mmx -mno-sse -fshort-wchar + -mno-mmx -mno-sse -fshort-wchar \ + -Wno-pointer-sign \ + $(call cc-disable-warning, address-of-packed-member) \ + $(call cc-disable-warning, gnu) # arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly # disable the stackleak plugin
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