switch a bunch of places to mnt_want_write_file()
authorAl Viro <viro@zeniv.linux.org.uk>
Wed, 23 Nov 2011 16:57:51 +0000 (11:57 -0500)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 4 Jan 2012 03:52:35 +0000 (22:52 -0500)
it's both faster (in case when file has been opened for write) and cleaner.

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

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