quota: Check for register_shrinker() failure.

register_shrinker() might return -ENOMEM error since Linux 3.12.
Call panic() as with other failure checks in this function if
register_shrinker() failed.

Fixes: 1d3d4437ea ("vmscan: per-node deferred work")
Signed-off-by: Tetsuo Handa <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Michal Hocko <[email protected]>
Reviewed-by: Michal Hocko <[email protected]>
Signed-off-by: Jan Kara <[email protected]>
This commit is contained in:
Tetsuo Handa 2017-11-29 22:34:50 +09:00 • committed by Jan Kara
commit 88bc0ede8d

View file

@ -2992,7 +2992,8 @@ static int __init dquot_init(void)
pr_info("VFS: Dquot-cache hash table entries: %ld (order %ld,"
" %ld bytes)\n", nr_hash, order, (PAGE_SIZE << order));
register_shrinker(&dqcache_shrinker);
if (register_shrinker(&dqcache_shrinker))
panic("Cannot register dquot shrinker");
return 0;
}