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| author | H. Peter Anvin <hpa@zytor.com> | 2010-02-10 16:55:28 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-10 16:55:28 -0800 |
| commit | 84abd88a70090cf00f9e45c3a81680874f17626e (patch) | |
| tree | 4f58b80057f6e1f5817af1dc33a5458b3dfc9a99 /arch/sparc/include/asm/system_64.h | |
| parent | 13ca0fcaa33f6b1984c4111b6ec5df42689fea6f (diff) | |
| parent | e28cab42f384745c8a947a9ccd51e4aae52f5d51 (diff) | |
| download | linux-84abd88a70090cf00f9e45c3a81680874f17626e.tar.bz2 | |
Merge remote branch 'linus/master' into x86/bootmem
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 25e848f0cad7..d47a98e66972 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") |