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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-12-02 23:38:13 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-12-02 23:38:13 -0800 |
| commit | 467832032cc07626880363efa8625719c16c04eb (patch) | |
| tree | ee9a62c04f0b3106e412bc1b2dd1cea5566d5ca7 /arch/sparc/include/asm/system_64.h | |
| parent | 66d2a5952eab875f1286e04f738ef029afdaf013 (diff) | |
| parent | 22763c5cf3690a681551162c15d34d935308c8d7 (diff) | |
Merge commit 'v2.6.32' into next
Diffstat (limited to 'arch/sparc/include/asm/system_64.h')
| -rw-r--r-- | arch/sparc/include/asm/system_64.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h index 25e848f0cad..d47a98e6697 100644 --- a/arch/sparc/include/asm/system_64.h +++ b/arch/sparc/include/asm/system_64.h @@ -63,6 +63,10 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \ : : : "memory"); \ } while (0) +/* The kernel always executes in TSO memory model these days, + * and furthermore most sparc64 chips implement more stringent + * memory ordering than required by the specifications. + */ #define mb() membar_safe("#StoreLoad") #define rmb() __asm__ __volatile__("":::"memory") #define wmb() __asm__ __volatile__("":::"memory") |