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jbd: Check return value of __getblk() 

Fail journal creation if __getblk() returns NULL.  unlikely() is
added because it is called in a loop and we've been OK without
the check until now.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Namhyung Kim 2010-10-13 17:17:18 +09:00 committed by Jan Kara
parent 81a4e320e6
commit 2a0e33889b
1 changed files with 2 additions and 0 deletions
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2
fs/jbd/journal.c
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@ -952,6 +952,8 @@ int journal_create(journal_t *journal)
if (err)
return err;
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
if (unlikely(!bh))
return -ENOMEM;
lock_buffer(bh);
memset (bh->b_data, 0, journal->j_blocksize);
BUFFER_TRACE(bh, "marking dirty");