nfs_common: convert int to bool

Since __state_in_grace return only true/false, make it return bool
instead of int.
Same change for the two user of it, locks_in_grace/opens_in_grace

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfs_common/grace.c

@@ -55,7 +55,7 @@ locks_end_grace(struct lock_manager *lm)
 }
 EXPORT_SYMBOL_GPL(locks_end_grace);
 
-static int
+static bool
 __state_in_grace(struct net *net, bool open)
 {
 	struct list_head *grace_list = net_generic(net, grace_net_id);
@@ -78,15 +78,15 @@ __state_in_grace(struct net *net, bool open)
  * to answer ordinary lock requests, and when they should accept only
  * lock reclaims.
  */
-int locks_in_grace(struct net *net)
+bool locks_in_grace(struct net *net)
 {
-	return __state_in_grace(net, 0);
+	return __state_in_grace(net, false);
 }
 EXPORT_SYMBOL_GPL(locks_in_grace);
 
-int opens_in_grace(struct net *net)
+bool opens_in_grace(struct net *net)
 {
-	return __state_in_grace(net, 1);
+	return __state_in_grace(net, true);
 }
 EXPORT_SYMBOL_GPL(opens_in_grace);