From: Peter Zijlstra <peterz@infradead.org>
To: tglx@linutronix.de
Cc: x86@kernel.org, elver@google.com, paulmck@kernel.org,
kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
peterz@infradead.org
Subject: [PATCH 3/3] x86, kcsan: Add __no_kcsan to noinstr
Date: Tue, 02 Jun 2020 19:31:06 +0200 [thread overview]
Message-ID: <20200602173348.458385730@infradead.org> (raw)
In-Reply-To: 20200602173103.931412766@infradead.org
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__ */
next prev parent reply other threads:[~2020-06-02 17:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-02 17:31 [PATCH 0/3] KCSAN cleanups and noinstr Peter Zijlstra
2020-06-02 17:31 ` [PATCH 1/3] x86, kcsan: Remove __no_kcsan_or_inline usage Peter Zijlstra
2020-06-02 17:31 ` [PATCH 2/3] kcsan: Remove __no_kcsan_or_inline Peter Zijlstra
2020-06-02 17:31 ` Peter Zijlstra [this message]
2020-06-02 18:46 ` [PATCH 0/3] KCSAN cleanups and noinstr Marco Elver
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