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| author | H. Peter Anvin <hpa@linux.intel.com> | 2011-08-04 16:13:20 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2011-08-04 16:13:20 -0700 |
| commit | 17b0436077d99211d8b26886235a36c5ec54ac57 (patch) | |
| tree | 8bcd9b4a0f8285f749814e95ae0365c611ba2392 /include/linux/percpu.h | |
| parent | aafade242ff24fac3aabf61c7861dfa44a3c2445 (diff) | |
| parent | 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe (diff) | |
| download | linux-next-17b0436077d99211d8b26886235a36c5ec54ac57.tar.gz | |
Merge commit 'v3.0' into x86/vdso
Diffstat (limited to 'include/linux/percpu.h')
| -rw-r--r-- | include/linux/percpu.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h index 8b97308e65df..9ca008f0c542 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -259,6 +259,9 @@ extern void __bad_size_call_parameter(void); * Special handling for cmpxchg_double. cmpxchg_double is passed two * percpu variables. The first has to be aligned to a double word * boundary and the second has to follow directly thereafter. + * We enforce this on all architectures even if they don't support + * a double cmpxchg instruction, since it's a cheap requirement, and it + * avoids breaking the requirement for architectures with the instruction. */ #define __pcpu_double_call_return_bool(stem, pcp1, pcp2, ...) \ ({ \ |