tree b04cc75b5e4a028bfdb619e0a0a0f8cd71113ff2
parent d9171b9345261e0d941d92fdda5672b5db67f968
author Al Viro <viro@zeniv.linux.org.uk> 1460747316 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1462232968 -0400

parallel lookups: actual switch to rwsem

ta-da!

The main issue is the lack of down_write_killable(), so the places
like readdir.c switched to plain inode_lock(); once killable
variants of rwsem primitives appear, that'll be dealt with.

lockdep side also might need more work

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>