From 02c0ab684fc41bc13ba8d5ad89b0dc73b092fa08 Mon Sep 17 00:00:00 2001
From: Yan Hong <clouds.yan@gmail.com>
Date: Wed, 12 Dec 2012 13:52:16 -0800
Subject: [PATCH] fs/buffer.c: remove redundant initialization in
 alloc_page_buffers()

buffer_head comes from kmem_cache_zalloc(), no need to zero its fields.

Signed-off-by: Yan Hong <clouds.yan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/buffer.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index 9083e528e3c9..c017a2dfb909 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -849,13 +849,10 @@ struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
 		if (!bh)
 			goto no_grow;
 
-		bh->b_bdev = NULL;
 		bh->b_this_page = head;
 		bh->b_blocknr = -1;
 		head = bh;
 
-		bh->b_state = 0;
-		atomic_set(&bh->b_count, 0);
 		bh->b_size = size;
 
 		/* Link the buffer to its page */
-- 
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