[PATCH] alloc_buffer_head() and free_buffer_head() cleanup

Signed-off-by: Coywolf Qi Hunt <qiyong@fc-cn.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 6 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index 6a25d7df89b1..a92b81403552 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3046,10 +3046,9 @@ struct buffer_head *alloc_buffer_head(unsigned int __nocast gfp_flags)
 {
         struct buffer_head *ret = kmem_cache_alloc(bh_cachep, gfp_flags);
         if (ret) {
-                preempt_disable();
-                __get_cpu_var(bh_accounting).nr++;
+                get_cpu_var(bh_accounting).nr++;
                 recalc_bh_state();
-                preempt_enable();
+                put_cpu_var(bh_accounting);
         }
         return ret;
 }
@@ -3059,10 +3058,9 @@ void free_buffer_head(struct buffer_head *bh)
 {
         BUG_ON(!list_empty(&bh->b_assoc_buffers));
         kmem_cache_free(bh_cachep, bh);
-        preempt_disable();
-        __get_cpu_var(bh_accounting).nr--;
+        get_cpu_var(bh_accounting).nr--;
         recalc_bh_state();
-        preempt_enable();
+        put_cpu_var(bh_accounting);
 }
 EXPORT_SYMBOL(free_buffer_head);