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| author |   Brian Gerst <brgerst@gmail.com> | 2010-09-09 18:17:26 +0200 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2010-09-10 10:56:47 +0200 |
| commit | db7829c6cc32f3c0c9a324118d743acb1abff081 (patch) | |
| tree | dd40c271aeda63843819072c753af74fefc1413c /tools/perf/scripts/python/sched-migration.py | |
| parent | percpu: clear memory allocated with the km allocator (diff) | |
| download | linux-dev-db7829c6cc32f3c0c9a324118d743acb1abff081.tar.xz linux-dev-db7829c6cc32f3c0c9a324118d743acb1abff081.zip | |
x86, percpu: Optimize this_cpu_ptr
Allow arches to implement __this_cpu_ptr, and provide an x86 version.
Before:
movq $foo, %rax
movq %gs:this_cpu_off, %rdx
addq %rdx, %rax
After:
movq $foo, %rax
addq %gs:this_cpu_off, %rax
The benefit is doing it in one less instruction and not clobbering
a temporary register.
tj: * Beefed up the comment a bit and renamed in-macro temp variable
to match neighboring macros.
* Folded fix for const pointer case found in linux-next.
* Fixed sparse notation.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/sched-migration.py')
0 files changed, 0 insertions, 0 deletions