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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-08-23 16:59:58 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2011-08-29 13:44:12 -0700 |
| commit | 8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb (patch) | |
| tree | 50a2f0faa3762084336be4f97c03a97b14b22262 /arch/x86/include/asm/atomic.h | |
| parent | 433b3520616be694e0aa777089346c8718c91a7b (diff) | |
| download | linux-stable-8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb.tar.gz linux-stable-8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb.tar.bz2 linux-stable-8b8bc2f7311c3223213dbe346d9cc2e299fdb5eb.zip | |
x86: Use xadd helper more widely
This covers the trivial cases from open-coded xadd to the xadd macros.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Link: http://lkml.kernel.org/r/4E5BCC40.3030501@goop.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/atomic.h')
| -rw-r--r-- | arch/x86/include/asm/atomic.h | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 10572e309ab2..58cb6d4085f7 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -172,18 +172,14 @@ static inline int atomic_add_negative(int i, atomic_t *v) */ static inline int atomic_add_return(int i, atomic_t *v) { - int __i; #ifdef CONFIG_M386 + int __i; unsigned long flags; if (unlikely(boot_cpu_data.x86 <= 3)) goto no_xadd; #endif /* Modern 486+ processor */ - __i = i; - asm volatile(LOCK_PREFIX "xaddl %0, %1" - : "+r" (i), "+m" (v->counter) - : : "memory"); - return i + __i; + return i + xadd(&v->counter, i); #ifdef CONFIG_M386 no_xadd: /* Legacy 386 processor */ |