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x86, kcsan: Add __no_kcsan to noinstr 

The 'noinstr' function attribute means no-instrumentation, this should
very much include *SAN. Because lots of that is broken at present,
only include KCSAN for now, as that is limited to clang11, which has
sane function attribute behaviour.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Peter Zijlstra 2020-06-02 18:47:11 +02:00
parent e79302ae8c
commit 5ddbc4082e
1 changed files with 4 additions and 4 deletions
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8
include/linux/compiler_types.h
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@ -118,10 +118,6 @@ struct ftrace_likely_data {
#define notrace __attribute__((__no_instrument_function__))
#endif
/* Section for code which can't be instrumented at all */
#define noinstr \
noinline notrace __attribute((__section__(".noinstr.text")))
/*
* it doesn't make sense on ARM (currently the only user of __naked)
* to trace naked functions because then mcount is called without
@ -200,6 +196,10 @@ struct ftrace_likely_data {
#define __no_sanitize_or_inline __always_inline
#endif
/* Section for code which can't be instrumented at all */
#define noinstr \
noinline notrace __attribute((__section__(".noinstr.text"))) __no_kcsan
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */