UBIFS: remove mst_mutex

The 'mst_mutex' is not needed since because 'ubifs_write_master()' is only
called on the mount path and commit path. The mount path is sequential and
there is no parallelism, and the commit path is also serialized - there is only
one commit going on at a time.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 977a01bf1720..c4fe900c67ab 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -1049,7 +1049,6 @@ struct ubifs_debug_info;
  *
  * @mst_node: master node
  * @mst_offs: offset of valid master node
- * @mst_mutex: protects the master node area, @mst_node, and @mst_offs
  *
  * @max_bu_buf_len: maximum bulk-read buffer length
  * @bu_mutex: protects the pre-allocated bulk-read buffer and @c->bu
@@ -1290,7 +1289,6 @@ struct ubifs_info {
 
         struct ubifs_mst_node *mst_node;
         int mst_offs;
-        struct mutex mst_mutex;
 
         int max_bu_buf_len;
         struct mutex bu_mutex;