Messages in this thread Patch in this message | | | Date | Thu, 04 Jun 2020 12:22:44 +0200 | From | Peter Zijlstra <> | Subject | [PATCH 3/8] x86, kcsan: Add __no_kcsan to noinstr |
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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> --- include/linux/compiler_types.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -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__ */
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