[XFS] kill parent == child checks in xfs_remove and xfs_rmdir

VFS guaranteed these can't happen.

SGI-PV: 976035
SGI-Modid: xfs-linux-melb:xfs-kern:30911a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 308dfff..2ebfc60 100644 (file)
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -2180,7 +2180,7 @@ xfs_remove(
        xfs_itrace_ref(ip);
 
        error = XFS_QM_DQATTACH(mp, dp, 0);
-       if (!error && dp != ip)
+       if (!error)
                error = XFS_QM_DQATTACH(mp, ip, 0);
        if (error) {
                REMOVE_DEBUG_TRACE(__LINE__);
@@ -2228,15 +2228,9 @@ xfs_remove(
         * inodes locked.
         */
        xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
-       if (dp != ip) {
-               /*
-                * Increment vnode ref count only in this case since
-                * there's an extra vnode reference in the case where
-                * dp == ip.
-                */
-               IHOLD(dp);
-               xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
-       }
+
+       IHOLD(dp);
+       xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 
        /*
         * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
@@ -2747,7 +2741,7 @@ xfs_rmdir(
         * Get the dquots for the inodes.
         */
        error = XFS_QM_DQATTACH(mp, dp, 0);
-       if (!error && dp != cdp)
+       if (!error)
                error = XFS_QM_DQATTACH(mp, cdp, 0);
        if (error) {
                IRELE(cdp);
@@ -2796,14 +2790,7 @@ xfs_rmdir(
        }
 
        xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
-       if (dp != cdp) {
-               /*
-                * Only increment the parent directory vnode count if
-                * we didn't bump it in looking up cdp.  The only time
-                * we don't bump it is when we're looking up ".".
-                */
-               VN_HOLD(dir_vp);
-       }
+       VN_HOLD(dir_vp);
 
        xfs_itrace_ref(cdp);
        xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL);