[PATCH 01/11] xfs: no need to lock the inode in xfs_find_handle

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

Both the inode number and the generation do not change on a live inode.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: xfs/fs/xfs/xfs_ioctl.c
===================================================================
--- xfs.orig/fs/xfs/xfs_ioctl.c 2013-12-06 19:16:33.819188640 +0100
+++ xfs/fs/xfs/xfs_ioctl.c      2013-12-06 19:17:04.087188019 +0100
@@ -112,15 +112,11 @@ xfs_find_handle(
                memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
                hsize = sizeof(xfs_fsid_t);
        } else {
-               int             lock_mode;
-
-               lock_mode = xfs_ilock_map_shared(ip);
                handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
                                        sizeof(handle.ha_fid.fid_len);
                handle.ha_fid.fid_pad = 0;
                handle.ha_fid.fid_gen = ip->i_d.di_gen;
                handle.ha_fid.fid_ino = ip->i_ino;
-               xfs_iunlock_map_shared(ip, lock_mode);
 
                hsize = XFS_HSIZE(handle);
        }