[PATCH 3.16.y-ckt 146/216] ocfs2: fix journal commit deadlock

3.16.7-ckt4 -stable review patch. If anyone has any objections, please let me know. -- From: Junxiao Bi commit 136f49b9171074872f2a14ad0ab10486d1ba13ca upstream. For buffer write, page lock will be got in write_begin and released in write_end, in ocfs2_write_end_nolock(),

[PATCH 3.16.y-ckt 146/216] ocfs2: fix journal commit deadlock

3.16.7-ckt4 -stable review patch. If anyone has any objections, please let me know. -- From: Junxiao Bi junxiao...@oracle.com commit 136f49b9171074872f2a14ad0ab10486d1ba13ca upstream. For buffer write, page lock will be got in write_begin and released in write_end, in