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| author | Marco Elver <elver@google.com> | 2020-05-21 16:20:43 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 20:04:02 +0200 |
| commit | 0bb9ab3a6fa7ca9f627d85f6f683fae51598e8c8 (patch) | |
| tree | 6ae2f6ea2f85aec437627ab65ab13a3822bebe81 /Documentation/dev-tools | |
| parent | e3b779d9ebe82b4be0121f25f27632844bb86d96 (diff) | |
| download | lwn-0bb9ab3a6fa7ca9f627d85f6f683fae51598e8c8.tar.gz lwn-0bb9ab3a6fa7ca9f627d85f6f683fae51598e8c8.zip | |
kcsan: Update Documentation to change supported compilers
Document change in required compiler version for KCSAN, and remove the
now redundant note about __no_kcsan and inlining problems with older
compilers.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20200521142047.169334-8-elver@google.com
Diffstat (limited to 'Documentation/dev-tools')
| -rw-r--r-- | Documentation/dev-tools/kcsan.rst | 9 |
1 files changed, 1 insertions, 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``:: |