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| author |   Marco Elver <elver@google.com> | 2019-12-12 01:07:09 +0100 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@kernel.org> | 2020-01-07 07:47:23 -0800 |
| commit | e33f9a169747880a008dd5e7b934fc592e91cd63 (patch) | |
| tree | b5c00fc4c864945c6531a93d1802d79308e5ea24 /include/linux/compiler.h | |
| parent | kcsan: Document static blacklisting options (diff) | |
| download | linux-dev-e33f9a169747880a008dd5e7b934fc592e91cd63.tar.xz linux-dev-e33f9a169747880a008dd5e7b934fc592e91cd63.zip | |
kcsan: Add __no_kcsan function attribute
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>
Diffstat (limited to 'include/linux/compiler.h')
| -rw-r--r-- | include/linux/compiler.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index ad8c76144a3c..8c0beb10c1dd 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -207,12 +207,15 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, # define __no_kasan_or_inline __always_inline #endif +#define __no_kcsan __no_sanitize_thread #ifdef __SANITIZE_THREAD__ /* * Rely on __SANITIZE_THREAD__ instead of CONFIG_KCSAN, to avoid not inlining in - * compilation units where instrumentation is disabled. + * compilation units where instrumentation is disabled. The attribute 'noinline' + * is required for older compilers, where implicit inlining of very small + * functions renders __no_sanitize_thread ineffective. */ -# define __no_kcsan_or_inline __no_sanitize_thread notrace __maybe_unused +# define __no_kcsan_or_inline __no_kcsan noinline notrace __maybe_unused # define __no_sanitize_or_inline __no_kcsan_or_inline #else # define __no_kcsan_or_inline __always_inline |