pull mnt_want_write()/mnt_drop_write() into kern_path_create()/done_path_create(...
authorAl Viro <viro@zeniv.linux.org.uk>
Thu, 19 Jul 2012 22:25:00 +0000 (02:25 +0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Sun, 29 Jul 2012 17:24:15 +0000 (21:24 +0400)
One side effect - attempt to create a cross-device link on a read-only fs fails
with EROFS instead of EXDEV now.  Makes more sense, POSIX allows, etc.

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

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