fs: buffer_head: remove kmem_cache constructor to reduce memory usage under slub
[linux-2.6.git] / fs / buffer.c
index 6fa5302..bc3212e 100644 (file)
@@ -3265,7 +3265,7 @@ static void recalc_bh_state(void)
        
 struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
 {
-       struct buffer_head *ret = kmem_cache_alloc(bh_cachep, gfp_flags);
+       struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags);
        if (ret) {
                INIT_LIST_HEAD(&ret->b_assoc_buffers);
                get_cpu_var(bh_accounting).nr++;
@@ -3352,15 +3352,6 @@ int bh_submit_read(struct buffer_head *bh)
 }
 EXPORT_SYMBOL(bh_submit_read);
 
-static void
-init_buffer_head(void *data)
-{
-       struct buffer_head *bh = data;
-
-       memset(bh, 0, sizeof(*bh));
-       INIT_LIST_HEAD(&bh->b_assoc_buffers);
-}
-
 void __init buffer_init(void)
 {
        int nrpages;
@@ -3369,7 +3360,7 @@ void __init buffer_init(void)
                        sizeof(struct buffer_head), 0,
                                (SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|
                                SLAB_MEM_SPREAD),
-                               init_buffer_head);
+                               NULL);
 
        /*
         * Limit the bh occupancy to 10% of ZONE_NORMAL