SUNRPC: Remove the BKL from the callback functions

Push it into those callback functions that actually need it.

Note that all the NFS operations use their own locking, so don't need the
BKL. Ditto for the rpcbind client.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

5 files changed, 17 insertions, 9 deletions

diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index fd7d4669776..1f6dc518505 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -224,7 +224,9 @@ void nlm_release_call(struct nlm_rqst *call)
 
 static void nlmclnt_rpc_release(void *data)
 {
+	lock_kernel();
 	nlm_release_call(data);
+	unlock_kernel();
 }
 
 static int nlm_wait_on_grace(wait_queue_head_t *queue)
@@ -710,7 +712,9 @@ static void nlmclnt_unlock_callback(struct rpc_task *task, void *data)
 die:
 	return;
  retry_rebind:
+	lock_kernel();
 	nlm_rebind_host(req->a_host);
+	unlock_kernel();
  retry_unlock:
 	rpc_restart_call(task);
 }
@@ -788,7 +792,9 @@ retry_cancel:
 	/* Don't ever retry more than 3 times */
 	if (req->a_retries++ >= NLMCLNT_MAX_RETRIES)
 		goto die;
+	lock_kernel();
 	nlm_rebind_host(req->a_host);
+	unlock_kernel();
 	rpc_restart_call(task);
 	rpc_delay(task, 30 * HZ);
 }
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index 385437e3387..2e27176ff42 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -248,7 +248,9 @@ static void nlm4svc_callback_exit(struct rpc_task *task, void *data)
 
 static void nlm4svc_callback_release(void *data)
 {
+	lock_kernel();
 	nlm_release_call(data);
+	unlock_kernel();
 }
 
 static const struct rpc_call_ops nlm4svc_callback_ops = {
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 81aca859bfd..56a08ab9a4c 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -795,6 +795,7 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
 
 	dprintk("lockd: GRANT_MSG RPC callback\n");
 
+	lock_kernel();
 	/* if the block is not on a list at this point then it has
 	 * been invalidated. Don't try to requeue it.
 	 *
@@ -804,7 +805,7 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
 	 * for nlm_blocked?
 	 */
 	if (list_empty(&block->b_list))
-		return;
+		goto out;
 
 	/* Technically, we should down the file semaphore here. Since we
 	 * move the block towards the head of the queue only, no harm
@@ -818,13 +819,17 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
 	}
 	nlmsvc_insert_block(block, timeout);
 	svc_wake_up(block->b_daemon);
+out:
+	unlock_kernel();
 }
 
 static void nlmsvc_grant_release(void *data)
 {
 	struct nlm_rqst		*call = data;
 
+	lock_kernel();
 	nlmsvc_release_block(call->a_block);
+	unlock_kernel();
 }
 
 static const struct rpc_call_ops nlmsvc_grant_ops = {
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index 88379cc6e0b..ce6952b50a7 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -278,7 +278,9 @@ static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
 
 static void nlmsvc_callback_release(void *data)
 {
+	lock_kernel();
 	nlm_release_call(data);
+	unlock_kernel();
 }
 
 static const struct rpc_call_ops nlmsvc_callback_ops = {
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 6288af05c20..385f427beda 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -576,9 +576,7 @@ EXPORT_SYMBOL_GPL(rpc_delay);
  */
 static void rpc_prepare_task(struct rpc_task *task)
 {
-	lock_kernel();
 	task->tk_ops->rpc_call_prepare(task, task->tk_calldata);
-	unlock_kernel();
 }
 
 /*
@@ -588,9 +586,7 @@ void rpc_exit_task(struct rpc_task *task)
 {
 	task->tk_action = NULL;
 	if (task->tk_ops->rpc_call_done != NULL) {
-		lock_kernel();
 		task->tk_ops->rpc_call_done(task, task->tk_calldata);
-		unlock_kernel();
 		if (task->tk_action != NULL) {
 			WARN_ON(RPC_ASSASSINATED(task));
 			/* Always release the RPC slot and buffer memory */
@@ -602,11 +598,8 @@ EXPORT_SYMBOL_GPL(rpc_exit_task);
 
 void rpc_release_calldata(const struct rpc_call_ops *ops, void *calldata)
 {
-	if (ops->rpc_release != NULL) {
-		lock_kernel();
+	if (ops->rpc_release != NULL)
 		ops->rpc_release(calldata);
-		unlock_kernel();
-	}
 }
 
 /*