quota: Remove dqonoff_mutex

The only places that were grabbing dqonoff_mutex are functions turning
quotas on and off and these are properly serialized using s_umount
semaphore. Remove dqonoff_mutex.

Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/quota.h b/include/linux/quota.h
index 55107a8ff887..b281d198ee5b 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -520,7 +520,6 @@ static inline void quota_send_warning(struct kqid qid, dev_t dev,
 struct quota_info {
         unsigned int flags;                     /* Flags for diskquotas on this device */
         struct mutex dqio_mutex;                /* lock device while I/O in progress */
-        struct mutex dqonoff_mutex;             /* Serialize quotaon & quotaoff */
         struct inode *files[MAXQUOTAS];         /* inodes of quotafiles */
         struct mem_dqinfo info[MAXQUOTAS];      /* Information for each quota type */
         const struct quota_format_ops *ops[MAXQUOTAS];  /* Operations for each type */