Merge branch 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack...

Pull quota scaling updates from Jan Kara:
 "This contains changes to make the quota subsystem more scalable.

  Reportedly it improves number of files created per second on ext4
  filesystem on fast storage by about a factor of 2x"

* 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: (28 commits)
  quota: Add lock annotations to struct members
  quota: Reduce contention on dq_data_lock
  fs: Provide __inode_get_bytes()
  quota: Inline dquot_[re]claim_reserved_space() into callsite
  quota: Inline inode_{incr,decr}_space() into callsites
  quota: Inline functions into their callsites
  ext4: Disable dirty list tracking of dquots when journalling quotas
  quota: Allow disabling tracking of dirty dquots in a list
  quota: Remove dq_wait_unused from dquot
  quota: Move locking into clear_dquot_dirty()
  quota: Do not dirty bad dquots
  quota: Fix possible corruption of dqi_flags
  quota: Propagate ->quota_read errors from v2_read_file_info()
  quota: Fix error codes in v2_read_file_info()
  quota: Push dqio_sem down to ->read_file_info()
  quota: Push dqio_sem down to ->write_file_info()
  quota: Push dqio_sem down to ->get_next_id()
  quota: Push dqio_sem down to ->release_dqblk()
  quota: Remove locking for writing to the old quota format
  quota: Do not acquire dqio_sem for dquot overwrites in v2 format
  ...

diff --cc fs/ext4/super.c
Simple merge

diff --cc fs/quota/dquot.c
Simple merge

diff --cc fs/quota/quota_v2.c
index 2259329616b7ed04712cf4da698c3fe1ec137e83,cdbf71664cdce08f66010d06f0204ee0a40ad50d..c0187cda2c1ed3ff65b449a74aa71c05ca29eb58
--- 1/fs/quota/quota_v2.c
--- 2/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@@ -106,12 -114,19 +114,17 @@@ static int v2_read_file_info(struct sup
               sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
        if (size != sizeof(struct v2_disk_dqinfo)) {
                quota_error(sb, "Can't read info structure");
-               return -1;
+               if (size < 0)
+                       ret = size;
+               else
+                       ret = -EIO;
+               goto out;
        }
        info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS);
-       if (!info->dqi_priv)
-               return -ENOMEM;
- 
+       if (!info->dqi_priv) {
 -              printk(KERN_WARNING
 -                     "Not enough memory for quota information structure.\n");
+               ret = -ENOMEM;
+               goto out;
+       }
        qinfo = info->dqi_priv;
        if (version == 0) {
                /* limits are stored as unsigned 32-bit data */

diff --cc include/linux/fs.h
Simple merge