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kcsan: Add __no_kcsan function attribute

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Since the use of -fsanitize=thread is an implementation detail of KCSAN,
the name __no_sanitize_thread could be misleading if used widely.
Instead, we introduce the __no_kcsan attribute which is shorter and more
accurate in the context of KCSAN.

This matches the attribute name __no_kcsan_or_inline. The use of
__kcsan_or_inline itself is still required for __always_inline functions
to retain compatibility with older compilers.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Marco Elver 2019-12-12 01:07:09 +01:00 • committed by Paul E. McKenney
parent 7161177481
commit e33f9a1697
2 changed files with 6 additions and 4 deletions
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3
include/linux/compiler-gcc.h
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@ -146,8 +146,7 @@
#endif
#if defined(__SANITIZE_THREAD__) && __has_attribute(__no_sanitize_thread__)
#define __no_sanitize_thread \
__attribute__((__noinline__)) __attribute__((no_sanitize_thread))
#define __no_sanitize_thread __attribute__((no_sanitize_thread))
#else
#define __no_sanitize_thread
#endif