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authorWill Deacon <will.deacon@arm.com>2014-02-04 12:29:13 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2014-02-07 16:46:07 +0000
commit95c4189689f92fba7ecf9097173404d4928c6e9b (patch)
treea2abbb0b084fab81afc4f87ebe809bf03ffade12 /arch/arm64/include/asm/cmpxchg.h
parent8e86f0b409a44193f1587e87b69c5dcf8f65be67 (diff)
arm64: asm: remove redundant "cc" clobbers
cbnz/tbnz don't update the condition flags, so remove the "cc" clobbers from inline asm blocks that only use these instructions to implement conditional branches. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/cmpxchg.h')
-rw-r--r--arch/arm64/include/asm/cmpxchg.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
index 189390ce865..57c0fa7bf71 100644
--- a/arch/arm64/include/asm/cmpxchg.h
+++ b/arch/arm64/include/asm/cmpxchg.h
@@ -34,7 +34,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
" cbnz %w1, 1b\n"
: "=&r" (ret), "=&r" (tmp), "+Q" (*(u8 *)ptr)
: "r" (x)
- : "cc", "memory");
+ : "memory");
break;
case 2:
asm volatile("// __xchg2\n"
@@ -43,7 +43,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
" cbnz %w1, 1b\n"
: "=&r" (ret), "=&r" (tmp), "+Q" (*(u16 *)ptr)
: "r" (x)
- : "cc", "memory");
+ : "memory");
break;
case 4:
asm volatile("// __xchg4\n"
@@ -52,7 +52,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
" cbnz %w1, 1b\n"
: "=&r" (ret), "=&r" (tmp), "+Q" (*(u32 *)ptr)
: "r" (x)
- : "cc", "memory");
+ : "memory");
break;
case 8:
asm volatile("// __xchg8\n"
@@ -61,7 +61,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size
" cbnz %w1, 1b\n"
: "=&r" (ret), "=&r" (tmp), "+Q" (*(u64 *)ptr)
: "r" (x)
- : "cc", "memory");
+ : "memory");
break;
default:
BUILD_BUG();