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| author |   Christoph Lameter <cl@linux.com> | 2010-12-06 11:40:03 -0600 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2010-12-17 15:18:04 +0100 |
| commit | cfb824349556904b319464139be5c75fce983b0d (patch) | |
| tree | e0f0094ffc8732457ae1233e5e2890788e3817ff /fs/buffer.c | |
| parent | vmstat: Use this_cpu_inc_return for vm statistics (diff) | |
| download | linux-dev-cfb824349556904b319464139be5c75fce983b0d.tar.xz linux-dev-cfb824349556904b319464139be5c75fce983b0d.zip | |
highmem: Use this_cpu_xx_return() operations
Use this_cpu operations to optimize access primitives for highmem.
The main effect is the avoidance of address calculations through the
use of a segment prefix.
V3->V4
- kmap_atomic_idx: Do not return a value.
- Use __this_cpu_dec without HIGHMEM_DEBUG
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'fs/buffer.c')
0 files changed, 0 insertions, 0 deletions