linux-ext4 - [PATCH] ext4: Fix reference counting on buffer head.

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Message-Id: <1202140039-7560-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
Date:	Mon,  4 Feb 2008 21:17:18 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	tytso@....edu
Cc:	linux-ext4@...r.kernel.org, Girish.Shilamkar@....COM,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: [PATCH] ext4: Fix reference counting on buffer head.

With journal checksum patch we added asyn commit of journal commit headers.
During the conversion we missed to take a reference on buffer head. Before
the change sync_dirty_buffer did the get_bh(). The associative put_bh is
done by journal_wait_on_commit_record()

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
---
 fs/jbd2/commit.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index da8d0eb..2b88ab0 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -136,7 +136,7 @@ static int journal_submit_commit_record(journal_t *journal,
 
 	JBUFFER_TRACE(descriptor, "submit commit block");
 	lock_buffer(bh);
-
+	get_bh(bh);
 	set_buffer_dirty(bh);
 	set_buffer_uptodate(bh);
 	bh->b_end_io = journal_end_buffer_io_sync;
-- 
1.5.4.rc3.24.gb53139-dirty

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