mount: move code to validate shared mounts in a separate function

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

mount.c

@@ -372,18 +372,12 @@ static int try_resolve_ext_mount(struct mount_info *info)
 	info->external = em;
 	return 0;
 }
-
-static int validate_mounts(struct mount_info *info, bool for_dump)
+static int validate_shared(struct mount_info *m)
 {
-	struct mount_info *m, *t;
-
-	for (m = info; m; m = m->next) {
-		if (m->parent == NULL || m->is_ns_root)
-			/* root mount can be any */
-			continue;
+	struct mount_info *ct, *t;
 
-		if (m->parent->shared_id && !list_empty(&m->parent->mnt_share)) {
-			struct mount_info *ct;
+	if (!list_empty(&m->parent->mnt_share))
+		return 0;
 
 	t = list_first_entry(&m->parent->mnt_share, struct mount_info, mnt_share);
 
@@ -399,7 +393,21 @@ static int validate_mounts(struct mount_info *info, bool for_dump)
 			m->mnt_id, m->mountpoint);
 		return -1;
 	}
-		}
+
+	return 0;
+}
+
+static int validate_mounts(struct mount_info *info, bool for_dump)
+{
+	struct mount_info *m, *t;
+
+	for (m = info; m; m = m->next) {
+		if (m->parent == NULL || m->is_ns_root)
+			/* root mount can be any */
+			continue;
+
+		if (m->parent->shared_id && validate_shared(m))
+			return -1;
 
 		/*
 		 * Mountpoint can point to / of an FS. In that case this FS