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| author | Jakob Koschel <jkl820.git@gmail.com> | 2023-07-19 00:29:12 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:18:56 -0700 |
| commit | 349fde599db65d4827820ef6553e3f9ee75b8c7c (patch) | |
| tree | 39267351bb36b0e555f57001c0b0f9e6b2df9e79 /arch/Kconfig | |
| parent | d9efb07dcb69a1e0428602597ececad34f3c717b (diff) | |
| download | linux-stable-349fde599db65d4827820ef6553e3f9ee75b8c7c.tar.gz linux-stable-349fde599db65d4827820ef6553e3f9ee75b8c7c.tar.bz2 linux-stable-349fde599db65d4827820ef6553e3f9ee75b8c7c.zip | |
arch: enable HAS_LTO_CLANG with KASAN and KCOV
Both KASAN and KCOV had issues with LTO_CLANG if DEBUG_INFO is enabled.
With LTO inlinable function calls are required to have debug info if they
are inlined into a function that has debug info.
Starting with LLVM 17 this will be fixed ([1],[2]) and enabling LTO with
KASAN/KCOV and DEBUG_INFO doesn't cause linker errors anymore.
Link: https://github.com/llvm/llvm-project/commit/913f7e93dac67ecff47bade862ba42f27cb68ca9
Link: https://github.com/llvm/llvm-project/commit/4a8b1249306ff11f229320abdeadf0c215a00400
Link: https://lkml.kernel.org/r/20230717-enable-kasan-lto1-v3-1-650e1efc19d1@gmail.com
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Jakob Koschel <jkl820.git@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index b2872e9d3760..94050a3f094e 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -732,7 +732,9 @@ config HAS_LTO_CLANG depends on $(success,$(AR) --help | head -n 1 | grep -qi llvm) depends on ARCH_SUPPORTS_LTO_CLANG depends on !FTRACE_MCOUNT_USE_RECORDMCOUNT - depends on !KASAN || KASAN_HW_TAGS + # https://github.com/ClangBuiltLinux/linux/issues/1721 + depends on (!KASAN || KASAN_HW_TAGS || CLANG_VERSION >= 170000) || !DEBUG_INFO + depends on (!KCOV || CLANG_VERSION >= 170000) || !DEBUG_INFO depends on !GCOV_KERNEL help The compiler and Kconfig options support building with Clang's |