lockd: move svc_exit_thread() into the thread

The normal place to call svc_exit_thread() is from the thread itself
just before it exists.
Do this for lockd.

This means that nlmsvc_rqst is not used out side of lockd_start_svc(),
so it can be made local to that function, and renamed to 'rqst'.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 91e7c83..9aa499a 100644 (file)
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -56,7 +56,6 @@ static DEFINE_MUTEX(nlmsvc_mutex);
 static unsigned int            nlmsvc_users;
 static struct svc_serv         *nlmsvc_serv;
 static struct task_struct      *nlmsvc_task;
-static struct svc_rqst         *nlmsvc_rqst;
 unsigned long                  nlmsvc_timeout;
 
 unsigned int lockd_net_id;
@@ -182,6 +181,11 @@ lockd(void *vrqstp)
        nlm_shutdown_hosts();
        cancel_delayed_work_sync(&ln->grace_period_end);
        locks_end_grace(&ln->lockd_manager);
+
+       dprintk("lockd_down: service stopped\n");
+
+       svc_exit_thread(rqstp);
+
        return 0;
 }
 
@@ -358,13 +362,14 @@ static void lockd_unregister_notifiers(void)
 static int lockd_start_svc(struct svc_serv *serv)
 {
        int error;
+       struct svc_rqst *rqst;
 
        /*
         * Create the kernel thread and wait for it to start.
         */
-       nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
-       if (IS_ERR(nlmsvc_rqst)) {
-               error = PTR_ERR(nlmsvc_rqst);
+       rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
+       if (IS_ERR(rqst)) {
+               error = PTR_ERR(rqst);
                printk(KERN_WARNING
                        "lockd_up: svc_rqst allocation failed, error=%d\n",
                        error);
@@ -374,24 +379,23 @@ static int lockd_start_svc(struct svc_serv *serv)
        svc_sock_update_bufs(serv);
        serv->sv_maxconn = nlm_max_connections;
 
-       nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name);
+       nlmsvc_task = kthread_create(lockd, rqst, "%s", serv->sv_name);
        if (IS_ERR(nlmsvc_task)) {
                error = PTR_ERR(nlmsvc_task);
                printk(KERN_WARNING
                        "lockd_up: kthread_run failed, error=%d\n", error);
                goto out_task;
        }
-       nlmsvc_rqst->rq_task = nlmsvc_task;
+       rqst->rq_task = nlmsvc_task;
        wake_up_process(nlmsvc_task);
 
        dprintk("lockd_up: service started\n");
        return 0;
 
 out_task:
-       svc_exit_thread(nlmsvc_rqst);
+       svc_exit_thread(rqst);
        nlmsvc_task = NULL;
 out_rqst:
-       nlmsvc_rqst = NULL;
        return error;
 }
 
@@ -500,9 +504,6 @@ lockd_down(struct net *net)
        }
        lockd_unregister_notifiers();
        kthread_stop(nlmsvc_task);
-       dprintk("lockd_down: service stopped\n");
-       svc_exit_thread(nlmsvc_rqst);
-       nlmsvc_rqst = NULL;
        dprintk("lockd_down: service destroyed\n");
        nlmsvc_serv = NULL;
        nlmsvc_task = NULL;