dlm: convert connections_lock in a mutex

The semaphore connections_lock is used as a mutex.  Convert it to the mutex
API.

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: Christine Caulfield <ccaulfie@redhat.com>
Cc: David Teigland <teigland@redhat.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Teigland <teigland@redhat.com>

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 7c1e5e5cccd8ae97a87a618ad9818d5b35721553..c7d232a9ae1254a8ad03ca4d770bbc0756270d8f 100644 (file)
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -50,6 +50,7 @@
 #include <linux/pagemap.h>
 #include <linux/idr.h>
 #include <linux/file.h>
+#include <linux/mutex.h>
 #include <linux/sctp.h>
 #include <net/sctp/user.h>
 
@@ -138,7 +139,7 @@ static struct workqueue_struct *recv_workqueue;
 static struct workqueue_struct *send_workqueue;
 
 static DEFINE_IDR(connections_idr);
-static DECLARE_MUTEX(connections_lock);
+static DEFINE_MUTEX(connections_lock);
 static int max_nodeid;
 static struct kmem_cache *con_cache;
 
@@ -205,9 +206,9 @@ static struct connection *nodeid2con(int nodeid, gfp_t allocation)
 {
        struct connection *con;
 
-       down(&connections_lock);
+       mutex_lock(&connections_lock);
        con = __nodeid2con(nodeid, allocation);
-       up(&connections_lock);
+       mutex_unlock(&connections_lock);
 
        return con;
 }
@@ -218,15 +219,15 @@ static struct connection *assoc2con(int assoc_id)
        int i;
        struct connection *con;
 
-       down(&connections_lock);
+       mutex_lock(&connections_lock);
        for (i=0; i<=max_nodeid; i++) {
                con = __nodeid2con(i, 0);
                if (con && con->sctp_assoc == assoc_id) {
-                       up(&connections_lock);
+                       mutex_unlock(&connections_lock);
                        return con;
                }
        }
-       up(&connections_lock);
+       mutex_unlock(&connections_lock);
        return NULL;
 }
 
@@ -381,7 +382,7 @@ static void sctp_init_failed(void)
        int i;
        struct connection *con;
 
-       down(&connections_lock);
+       mutex_lock(&connections_lock);
        for (i=1; i<=max_nodeid; i++) {
                con = __nodeid2con(i, 0);
                if (!con)
@@ -393,7 +394,7 @@ static void sctp_init_failed(void)
                        }
                }
        }
-       up(&connections_lock);
+       mutex_unlock(&connections_lock);
 }
 
 /* Something happened to an association */
@@ -1417,7 +1418,7 @@ void dlm_lowcomms_stop(void)
        /* Set all the flags to prevent any
           socket activity.
        */
-       down(&connections_lock);
+       mutex_lock(&connections_lock);
        for (i = 0; i <= max_nodeid; i++) {
                con = __nodeid2con(i, 0);
                if (con) {
@@ -1426,11 +1427,11 @@ void dlm_lowcomms_stop(void)
                                con->sock->sk->sk_user_data = NULL;
                }
        }
-       up(&connections_lock);
+       mutex_unlock(&connections_lock);
 
        work_stop();
 
-       down(&connections_lock);
+       mutex_lock(&connections_lock);
        clean_writequeues();
 
        for (i = 0; i <= max_nodeid; i++) {
@@ -1443,7 +1444,7 @@ void dlm_lowcomms_stop(void)
                }
        }
        max_nodeid = 0;
-       up(&connections_lock);
+       mutex_unlock(&connections_lock);
        kmem_cache_destroy(con_cache);
        idr_init(&connections_idr);
 }