fs/buffer.c: remove unnecessary init operation after allocating buffe…

…r_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 <[email protected]> Cc: Jan Kara <[email protected]> Cc: Theodore Ts'o <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
rtvt123 · Apr 29, 2013 · e760040 · e760040
1 parent 3464046
commit e760040
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diff --git a/fs/buffer.c b/fs/buffer.c
@@ -865,8 +865,6 @@ struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
 
 		/* 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
@@ -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
@@ -367,8 +367,6 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
 	}
 
 	/* 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 */