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jbd2: move bdget out of critical section

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bdget() should not be called when we hold spinlocks since
it might sleep.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Zhu Yanhai <gaoyang.zyh@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Zhu Yanhai 2011-04-04 12:58:12 -04:00 committed by Theodore Ts'o
parent 0ce790e7d7
commit 50f689af01
1 changed files with 2 additions and 1 deletions
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3
fs/jbd2/journal.c
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@ -2413,10 +2413,12 @@ const char *jbd2_dev_to_name(dev_t device)
new_dev = kmalloc(sizeof(struct devname_cache), GFP_KERNEL);
if (!new_dev)
return "NODEV-ALLOCFAILURE"; /* Something non-NULL */
bd = bdget(device);
spin_lock(&devname_cache_lock);
if (devcache[i]) {
if (devcache[i]->device == device) {
kfree(new_dev);
bdput(bd);
ret = devcache[i]->devname;
spin_unlock(&devname_cache_lock);
return ret;
@ -2425,7 +2427,6 @@ const char *jbd2_dev_to_name(dev_t device)
}
devcache[i] = new_dev;
devcache[i]->device = device;
bd = bdget(device);
if (bd) {
bdevname(bd, devcache[i]->devname);
bdput(bd);