commit 92986796d84ef939e304099dece32572a755b280
author Al Viro <viro@ZenIV.linux.org.uk> Fri Mar 04 17:14:37 2011 +0000
committer root <Chris Mason chris.mason@oracle.com> Mon Mar 28 05:37:55 2011 -0400
tree d3356c2aa2bbc64166b09647c8760f7a6941df44
parent c2db1073fdf9757e6fd8b4a59d15b6ecc7a2af8a

btrfs: don't mess with i_nlink of unlocked inode in rename()

old_inode is not locked; it's not safe to play with its link
count.  Instead of bumping it and calling btrfs_unlink_inode(),
add a variant of the latter that does not do btrfs_drop_nlink()/
btrfs_update_inode(), call it instead of btrfs_inc_nlink()/
btrfs_unlink_inode() and do btrfs_update_inode() ourselves.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Chris Mason <chris.mason@oracle.com>