tree ec40fbbad46725d88f2c16b11ff5976d87f497bb
parent 63b6df14134ddd048984c8afadb46e721815bfc6
author Al Viro <viro@zeniv.linux.org.uk> 1461208112 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1462232969 -0400

introduce a parallel variant of ->iterate()

New method: ->iterate_shared().  Same arguments as in ->iterate(),
called with the directory locked only shared.  Once all filesystems
switch, the old one will be gone.

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