From e76004093db167730bb3871d6c307a3e32a821f4 Mon Sep 17 00:00:00 2001
From: majianpeng <majianpeng@gmail.com>
Date: Mon, 29 Apr 2013 15:08:51 -0700
Subject: fs/buffer.c: remove unnecessary init operation after allocating
 buffer_head.

bh allocation uses kmem_cache_zalloc() so we needn't call
'init_buffer(bh, NULL, NULL)' and perform other set-zero-operations.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/buffer.c       | 2 --
 fs/jbd/journal.c  | 2 --
 fs/jbd2/journal.c | 2 --
 3 files changed, 6 deletions(-)

(limited to 'fs')

diff --git a/fs/buffer.c b/fs/buffer.c
index 71578d69b82d..10ef81e10b20 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -865,8 +865,6 @@ try_again:
 
 		/* Link the buffer to its page */
 		set_bh_page(bh, page, offset);
-
-		init_buffer(bh, NULL, NULL);
 	}
 	return head;
 /*
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index 81cc7eaff863..865c4308acb6 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -310,8 +310,6 @@ int journal_write_metadata_buffer(transaction_t *transaction,
 
 	new_bh = alloc_buffer_head(GFP_NOFS|__GFP_NOFAIL);
 	/* keep subsequent assertions sane */
-	new_bh->b_state = 0;
-	init_buffer(new_bh, NULL, NULL);
 	atomic_set(&new_bh->b_count, 1);
 	new_jh = journal_add_journal_head(new_bh);	/* This sleeps */
 
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index ed10991ab006..8b220f1ab54f 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -367,8 +367,6 @@ retry_alloc:
 	}
 
 	/* keep subsequent assertions sane */
-	new_bh->b_state = 0;
-	init_buffer(new_bh, NULL, NULL);
 	atomic_set(&new_bh->b_count, 1);
 	new_jh = jbd2_journal_add_journal_head(new_bh);	/* This sleeps */
 
-- 
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