tree 324ca15510faae1060b5df21b8c5e68c5939e8b0
parent 29faed1638e6b2ace499e1b848cc3337ef6a6ad5
author Dmitry Monakhov <dmonakhov@openvz.org> 1406514747 -0400
committer Theodore Ts'o <tytso@mit.edu> 1406514747 -0400

ext4: fix incorrect locking in move_extent_per_page

If we have to copy data we must drop i_data_sem because of
get_blocks() will be called inside mext_page_mkuptodate(), but later we must
reacquire it again because we are about to change extent's tree

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>