diff options
| author |   Christoph Hellwig <hch@infradead.org> | 2011-12-06 21:58:15 +0000 |
|---|---|---|
| committer |   Ben Myers <bpm@sgi.com> | 2011-12-13 11:43:35 -0600 |
| commit | 497507b9ee63499d364ad7149c584285cd925dfc (patch) | |
| tree | a0377653cae16e61443a6fb46bd52b511f28e86f /fs/xfs | |
| parent | xfs: cleanup dquot locking helpers (diff) | |
| download | linux-dev-497507b9ee63499d364ad7149c584285cd925dfc.tar.xz linux-dev-497507b9ee63499d364ad7149c584285cd925dfc.zip | |
xfs: cleanup xfs_qm_dqlookup
Rearrange the code to avoid the conditional locking around the flist_locked
variable. This means we lose a (rather pointless) assert, and hold the
freelist lock a bit longer for one corner case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_dquot.c | 25 |
1 files changed, 5 insertions, 20 deletions
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c index 13eef1f92d20..2a9ffc1086bc 100644 --- a/fs/xfs/xfs_dquot.c +++ b/fs/xfs/xfs_dquot.c @@ -710,12 +710,9 @@ xfs_qm_dqlookup( xfs_dquot_t **O_dqpp) { xfs_dquot_t *dqp; - uint flist_locked; ASSERT(mutex_is_locked(&qh->qh_lock)); - flist_locked = B_FALSE; - /* * Traverse the hashchain looking for a match */ @@ -750,31 +747,19 @@ xfs_qm_dqlookup( xfs_dqlock(dqp); dqp->dq_flags &= ~(XFS_DQ_WANT); } - flist_locked = B_TRUE; - } - - /* - * id couldn't have changed; we had the hashlock all - * along - */ - ASSERT(be32_to_cpu(dqp->q_core.d_id) == id); - if (flist_locked) { - if (dqp->q_nrefs != 0) { - mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock); - flist_locked = B_FALSE; - } else { + if (dqp->q_nrefs == 0) { /* take it off the freelist */ trace_xfs_dqlookup_freelist(dqp); list_del_init(&dqp->q_freelist); xfs_Gqm->qm_dqfrlist_cnt--; } + XFS_DQHOLD(dqp); + mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock); + } else { + XFS_DQHOLD(dqp); } - XFS_DQHOLD(dqp); - - if (flist_locked) - mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock); /* * move the dquot to the front of the hashchain */ |