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| author | Niu Yawei <yawei.niu@gmail.com> | 2014-06-04 08:22:13 +0400 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2014-07-16 00:36:18 +0400 |
| commit | d68aab6b8f572406aa93b45ef6483934dd3b54a6 (patch) | |
| tree | e21ddba36d8ffa6706dc0c0db4ff7f8a81a92f2e /fs/quota/dquot.c | |
| parent | 1795cd9b3a91d4b5473c97f491d63892442212ab (diff) | |
| download | linux-d68aab6b8f572406aa93b45ef6483934dd3b54a6.tar.xz | |
quota: missing lock in dqcache_shrink_scan()
Commit 1ab6c4997e04 (fs: convert fs shrinkers to new scan/count API)
accidentally removed locking from quota shrinker. Fix it -
dqcache_shrink_scan() should use dq_list_lock to protect the
scan on free_dquots list.
CC: stable@vger.kernel.org
Fixes: 1ab6c4997e04a00c50c6d786c2f046adc0d1f5de
Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota/dquot.c')
| -rw-r--r-- | fs/quota/dquot.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 9cd5f63715c0..7f30bdc57d13 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -702,6 +702,7 @@ dqcache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) struct dquot *dquot; unsigned long freed = 0; + spin_lock(&dq_list_lock); head = free_dquots.prev; while (head != &free_dquots && sc->nr_to_scan) { dquot = list_entry(head, struct dquot, dq_free); @@ -713,6 +714,7 @@ dqcache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) freed++; head = free_dquots.prev; } + spin_unlock(&dq_list_lock); return freed; } |