| commit | 4532b305e8f0c238dd73048068ff8a6dd1380291 | [log] [tgz] |
|---|---|---|
| author | H. Peter Anvin <hpa@linux.intel.com> | Wed Jul 28 15:18:35 2010 -0700 |
| committer | H. Peter Anvin <hpa@linux.intel.com> | Wed Jul 28 15:24:09 2010 -0700 |
| tree | e4f9e4d78385dc45ab2456edf02ab515442f1cc1 | |
| parent | 69309a05907546fb686b251d4ab041c26afe1e1d [diff] |
x86, asm: Clean up and simplify <asm/cmpxchg.h> Remove the __xg() hack to create a memory barrier near xchg and cmpxchg; it has been there since 1.3.11 but should not be necessary with "asm volatile" and a "memory" clobber, neither of which were there in the original implementation. However, we *should* make this a volatile reference. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> LKML-Reference: <AANLkTikAmaDPji-TVDarmG1yD=fwbffcsmEU=YEuP+8r@mail.gmail.com>