summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_symlink.c
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2016-11-30 14:33:25 +1100
committerDave Chinner <david@fromorbit.com>2016-11-30 14:33:25 +1100
commit6552321831dce87ff5c466a55b58d472732caadc (patch)
tree84f3de7b89690c84fd13e2efa7a85d4918d342e3 /fs/xfs/xfs_symlink.c
parentf8319483f57f1ca22370f4150bb990aca7728a67 (diff)
xfs: remove i_iolock and use i_rwsem in the VFS inode instead
This patch drops the XFS-own i_iolock and uses the VFS i_rwsem which recently replaced i_mutex instead. This means we only have to take one lock instead of two in many fast path operations, and we can also shrink the xfs_inode structure. Thanks to the xfs_ilock family there is very little churn, the only thing of note is that we need to switch to use the lock_two_directory helper for taking the i_rwsem on two inodes in a few places to make sure our lock order matches the one used in the VFS. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Jens Axboe <axboe@fb.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_symlink.c')
-rw-r--r--fs/xfs/xfs_symlink.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index 58142aeeeea6..f2cb45ed1d54 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -238,8 +238,7 @@ xfs_symlink(
if (error)
goto out_release_inode;
- xfs_ilock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL |
- XFS_IOLOCK_PARENT | XFS_ILOCK_PARENT);
+ xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
unlock_dp_on_error = true;
/*
@@ -287,7 +286,7 @@ xfs_symlink(
* the transaction cancel unlocking dp so don't do it explicitly in the
* error path.
*/
- xfs_trans_ijoin(tp, dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
unlock_dp_on_error = false;
/*
@@ -412,7 +411,7 @@ out_release_inode:
xfs_qm_dqrele(pdqp);
if (unlock_dp_on_error)
- xfs_iunlock(dp, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
return error;
}