[PATCH 3.16.y-ckt 080/185] fs/ufs: restore s_lock mutex

3.16.7-ckt15 -stable review patch. If anyone has any objections, please let me know. -- From: Fabian Frederick commit cdd9eefdf905e92e7fc6cc393314efe68dc6ff66 upstream. Commit 0244756edc4b98c ("ufs: sb mutex merge + mutex_destroy") generated deadlocks in read/write mode on

[PATCH 3.16.y-ckt 080/185] fs/ufs: restore s_lock mutex

3.16.7-ckt15 -stable review patch. If anyone has any objections, please let me know. -- From: Fabian Frederick f...@skynet.be commit cdd9eefdf905e92e7fc6cc393314efe68dc6ff66 upstream. Commit 0244756edc4b98c (ufs: sb mutex merge + mutex_destroy) generated deadlocks in