The following commit has been merged into the locking/kcsan branch of tip: Commit-ID: 345043266de282a4059bc8336e2bcdd3680cc8f0 Gitweb: https://git.kernel.org/tip/345043266de282a4059bc8336e2bcdd3680cc8f0 Author: Marco Elver <el...@google.com> AuthorDate: Thu, 21 May 2020 16:20:43 +02:00 Committer: Borislav Petkov <b...@suse.de> CommitterDate: Fri, 22 May 2020 15:13:45 +02:00
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 <el...@google.com> Signed-off-by: Borislav Petkov <b...@suse.de> Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org> Acked-by: Will Deacon <w...@kernel.org> Link: https://lkml.kernel.org/r/20200521142047.169334-8-el...@google.com --- 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 f4b5766..ce4bbd9 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``::
