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>

diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 8b6c9e807efb7b8a47bf493563bd5d8dadde3f4f..ccafe8ef7ad5cab12f78c7fce06b5dfbacb6cb47 100644 (file)
--- 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