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author | Christoph Lameter <cl@linux.com> | 2011-02-28 10:02:24 (GMT) |
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committer | Tejun Heo <tj@kernel.org> | 2011-02-28 10:20:03 (GMT) |
commit | 7c3343392172ba98d9d90a83edcc4c2e80897009 (patch) | |
tree | 7faca8ca7e3a986e925d47a715799f1fd9f0fd89 /arch/ia64 | |
parent | 0f06c063628689de5eab5dfb3ce9c797a09db900 (diff) | |
download | linux-7c3343392172ba98d9d90a83edcc4c2e80897009.tar.xz |
percpu: Generic support for this_cpu_cmpxchg_double()
Introduce this_cpu_cmpxchg_double(). this_cpu_cmpxchg_double() allows
the comparison between two consecutive words and replaces them if
there is a match.
bool this_cpu_cmpxchg_double(pcp1, pcp2,
old_word1, old_word2, new_word1, new_word2)
this_cpu_cmpxchg_double does not return the old value (difficult since
there are two words) but a boolean indicating if the operation was
successful.
The first percpu variable must be double word aligned!
-tj: Updated to return bool instead of int, converted size check to
BUILD_BUG_ON() instead of VM_BUG_ON() and other cosmetic changes.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/ia64')
0 files changed, 0 insertions, 0 deletions