From: Nathan Chancellor <nathan@kernel.org> To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, x86@kernel.org, Masahiro Yamada <masahiroy@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com>, Nick Desaulniers <ndesaulniers@google.com>, linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com, llvm@lists.linux.dev, Nathan Chancellor <nathan@kernel.org> Subject: [PATCH 0/2] Harden clang against unknown flag options Date: Mon, 23 Aug 2021 19:26:38 -0700 [thread overview] Message-ID: <20210824022640.2170859-1-nathan@kernel.org> (raw) Hi all, This series cleans up an issue that was noticed by the kernel test robot where flags that clang does not implement support for are unconditionally added to the command line, which causes all subsequent calls to cc-{disable-warning,option} to fail, meaning developers are flooded with unnecessary and pointless warnings. I hope the patches in and of themselves are reasonable and non-controversial. This is based on Masahiro's kbuild tree as there was a fairly large refactor around where clang's flags were added so I figured it would be best to go there with an x86 ack since the first patch does not depend on anything in -tip. Cheers, Nathan Nathan Chancellor (2): x86: Do not add -falign flags unconditionally for clang kbuild: Add -Werror=ignored-optimization-argument to CLANG_FLAGS arch/x86/Makefile_32.cpu | 12 +++++++++--- scripts/Makefile.clang | 4 ++++ 2 files changed, 13 insertions(+), 3 deletions(-) base-commit: fb3fdea450305d932d933d7e75eead0477249d8e -- 2.33.0
next reply other threads:[~2021-08-24 2:27 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-24 2:26 Nathan Chancellor [this message] 2021-08-24 2:26 ` [PATCH 1/2] x86: Do not add -falign flags unconditionally for clang Nathan Chancellor 2021-08-24 2:56 ` Fangrui Song 2021-08-24 21:53 ` Nathan Chancellor 2021-08-25 22:32 ` Nick Desaulniers 2021-08-25 22:32 ` Nick Desaulniers 2021-09-16 17:18 ` Borislav Petkov 2021-09-16 18:42 ` Nathan Chancellor 2021-09-16 19:05 ` Borislav Petkov 2021-08-24 2:26 ` [PATCH 2/2] kbuild: Add -Werror=ignored-optimization-argument to CLANG_FLAGS Nathan Chancellor 2021-08-25 22:27 ` Nick Desaulniers 2021-08-25 22:27 ` Nick Desaulniers 2021-09-13 18:08 ` [PATCH 0/2] Harden clang against unknown flag options Nathan Chancellor
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