[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>

diff --git a/fs/buffer.c b/fs/buffer.c
index 6a25d7d..a92b814 100644 (file)
--- 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);