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| author | Christoph Lameter <cl@linux.com> | 2010-12-06 11:40:05 -0600 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2010-12-17 15:18:05 +0100 |
| commit | ee1be8626355e6a1f3f8c44e2351ff2661c5998d (patch) | |
| tree | cc7d20969444eb5e3c0541991014ef4fc5332185 /fs/buffer.c | |
| parent | cfb824349556904b319464139be5c75fce983b0d (diff) | |
| download | lwn-ee1be8626355e6a1f3f8c44e2351ff2661c5998d.tar.gz lwn-ee1be8626355e6a1f3f8c44e2351ff2661c5998d.zip | |
fs: Use this_cpu_inc_return in buffer.c
__this_cpu_inc can create a single instruction with the same effect
as the _get_cpu_var(..)++ construct in buffer.c.
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
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')
| -rw-r--r-- | fs/buffer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index 137d9de00e24..2219a76e2caf 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3201,7 +3201,7 @@ static void recalc_bh_state(void) int i; int tot = 0; - if (__get_cpu_var(bh_accounting).ratelimit++ < 4096) + if (__this_cpu_inc_return(bh_accounting.ratelimit) - 1 < 4096) return; __this_cpu_write(bh_accounting.ratelimit, 0); for_each_online_cpu(i) |