Messages in this thread Patch in this message | | | Date | Thu, 21 May 2020 16:20:43 +0200 | Subject | [PATCH -tip v3 07/11] kcsan: Update Documentation to change supported compilers | From | Marco Elver <> |
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Document change in required compiler version for KCSAN, and remove the now redundant note about __no_kcsan and inlining problems with older compilers.
Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Marco Elver <elver@google.com> --- v3: * Add missing commit message. --- Documentation/dev-tools/kcsan.rst | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/Documentation/dev-tools/kcsan.rst b/Documentation/dev-tools/kcsan.rst index f4b5766f12cc..ce4bbd918648 100644 --- a/Documentation/dev-tools/kcsan.rst +++ b/Documentation/dev-tools/kcsan.rst @@ -8,8 +8,7 @@ approach to detect races. KCSAN's primary purpose is to detect `data races`_. Usage ----- -KCSAN is supported in both GCC and Clang. With GCC it requires version 7.3.0 or -later. With Clang it requires version 7.0.0 or later. +KCSAN requires Clang version 11 or later. To enable KCSAN configure the kernel with:: @@ -121,12 +120,6 @@ the below options are available: static __no_kcsan_or_inline void foo(void) { ... - Note: Older compiler versions (GCC < 9) also do not always honor the - ``__no_kcsan`` attribute on regular ``inline`` functions. If false positives - with these compilers cannot be tolerated, for small functions where - ``__always_inline`` would be appropriate, ``__no_kcsan_or_inline`` should be - preferred instead. - * To disable data race detection for a particular compilation unit, add to the ``Makefile``:: -- 2.26.2.761.g0e0b3e54be-goog
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