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arm64: do not trace atomic operations

Message ID f3159358fc4feb62f25bbaca9b3f949bc4341f0b.1486390538.git.panand@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Pratyush Anand Feb. 6, 2017, 2:16 p.m. UTC 
Atomic operation function symbols are exported,when
CONFIG_ARM64_LSE_ATOMICS is defined. Prefix them with notrace, so that
an user can not trace these functions. Tracing these functions causes
kernel crash.

Signed-off-by: Pratyush Anand <panand@redhat.com>
---
 arch/arm64/include/asm/lse.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/include/asm/lse.h b/arch/arm64/include/asm/lse.h
index fc756e22c84c..606b20910a5c 100644
--- a/arch/arm64/include/asm/lse.h
+++ b/arch/arm64/include/asm/lse.h
@@ -19,7 +19,7 @@ 
 __asm__(".arch_extension	lse");
 
 /* Move the ll/sc atomics out-of-line */
-#define __LL_SC_INLINE
+#define __LL_SC_INLINE		notrace
 #define __LL_SC_PREFIX(x)	__ll_sc_##x
 #define __LL_SC_EXPORT(x)	EXPORT_SYMBOL(__LL_SC_PREFIX(x))