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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>
This commit is contained in:
Matthias Kaehlcke 2008-05-12 10:04:51 -05:00 committed by David Teigland
parent 860da5e578
commit 7a936ce71e
1 changed files with 13 additions and 12 deletions
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25
fs/dlm/lowcomms.c
View File

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