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authorChristoph Lameter <cl@linux-foundation.org>2009-10-03 19:48:23 +0900
committerTejun Heo <tj@kernel.org>2009-10-03 19:48:23 +0900
commit7a9e02d6bb05b268dc403d7ee87ce4198062f838 (patch)
treef38920e87e9d908c19e881ccbf549ae4035f9724
parente7dcaa4755e35d7540bf19f316f8798357c53fa0 (diff)
this_cpu: xfs_icsb_modify_counters does not need "cpu" variable
The xfs_icsb_modify_counters() function no longer needs the cpu variable if we use this_cpu_ptr() and we can get rid of get/put_cpu(). Acked-by: Tejun Heo <tj@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Olaf Weber <olaf@sgi.com> Signed-off-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Tejun Heo <tj@kernel.org>
-rw-r--r--fs/xfs/xfs_mount.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 8b6c9e807ef..ccafe8ef7ad 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -2389,12 +2389,12 @@ xfs_icsb_modify_counters(
{
xfs_icsb_cnts_t *icsbp;
long long lcounter; /* long counter for 64 bit fields */
- int cpu, ret = 0;
+ int ret = 0;
might_sleep();
again:
- cpu = get_cpu();
- icsbp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, cpu);
+ preempt_disable();
+ icsbp = this_cpu_ptr(mp->m_sb_cnts);
/*
* if the counter is disabled, go to slow path
@@ -2438,11 +2438,11 @@ again:
break;
}
xfs_icsb_unlock_cntr(icsbp);
- put_cpu();
+ preempt_enable();
return 0;
slow_path:
- put_cpu();
+ preempt_enable();
/*
* serialise with a mutex so we don't burn lots of cpu on
@@ -2490,7 +2490,7 @@ slow_path:
balance_counter:
xfs_icsb_unlock_cntr(icsbp);
- put_cpu();
+ preempt_enable();
/*
* We may have multiple threads here if multiple per-cpu