configfs: Convert subsystem semaphore to mutex

Convert the su_sem member of struct configfs_subsystem to a struct
mutex, as that's what it is. Also convert all the users and update
Documentation/configfs.txt and Documentation/configfs_example.c
accordingly.

[ Conflict in fs/dlm/config.c with commit
  3168b0780d06ace875696f8a648d04d6089654e5 manually resolved. --Mark ]

Inspired-by: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/Documentation/filesystems/configfs/configfs_example.c b/Documentation/filesystems/configfs/configfs_example.c
index 2d6a14a463e0..e56d49264b39 100644
--- a/Documentation/filesystems/configfs/configfs_example.c
+++ b/Documentation/filesystems/configfs/configfs_example.c
@@ -453,7 +453,7 @@ static int __init configfs_example_init(void)
                 subsys = example_subsys[i];
 
                 config_group_init(&subsys->su_group);
-                init_MUTEX(&subsys->su_sem);
+                mutex_init(&subsys->su_mutex);
                 ret = configfs_register_subsystem(subsys);
                 if (ret) {
                         printk(KERN_ERR "Error %d while registering subsystem %s\n",