commit ebc1ac164560a241d9bf1b7519062910c3f90a01
author Christoph Hellwig <hch@lst.de> Mon May 11 23:35:03 2009 +0200
committer Al Viro <viro@zeniv.linux.org.uk> Thu Jun 11 21:36:09 2009 -0400
tree db17fd3043b15f8269cce2c2d00213814022fc30
parent 01ba687577647beef6c5f2ea59bfb56fac9fcde2

->write_super lock_super pushdown

Push down lock_super into ->write_super instances and remove it from the
caller.

Following filesystem don't need ->s_lock in ->write_super and are skipped:

 * bfs, nilfs2 - no other uses of s_lock and have internal locks in
	->write_super
 * ext2 - uses BKL in ext2_write_super and has internal calls without s_lock
 * reiserfs - no other uses of s_lock as has reiserfs_write_lock (BKL) in
 	->write_super
 * xfs - no other uses of s_lock and uses internal lock (buffer lock on
	superblock buffer) to serialize ->write_super.  Also xfs_fs_write_super
	is superflous and will go away in the next merge window

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>