Akira Fujita 49bd22bc4d ext4: fix possible recursive locking warning in EXT4_IOC_MOVE_EXT
If CONFIG_PROVE_LOCKING is enabled, the double_down_write_data_sem()
will trigger a false-positive warning of a recursive lock.  Since we
take i_data_sem for the two inodes ordered by their inode numbers,
this isn't a problem.  Use of down_write_nested() will notify the lock
dependency checker machinery that there is no problem here.

This problem was reported by Brian Rogers:

	http://marc.info/?l=linux-ext4&m=125115356928011&w=1

Reported-by: Brian Rogers <brian@xyzw.org>
Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-11-23 07:24:41 -05:00
..
2009-09-27 11:39:25 -07:00
2009-10-01 02:21:07 -04:00
2008-10-10 20:02:48 -04:00
2008-10-10 20:02:48 -04:00