diff --git a/[refs] b/[refs]
index 4205a00ff350..e2b2ef2db170 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 37a034729ae611295bbb8e925333d4d54d7c1ebc
+refs/heads/master: cda9e0cd8a6b30ccc32edced066c378fbd87003d
diff --git a/trunk/fs/nfsd/nfsctl.c b/trunk/fs/nfsd/nfsctl.c
index 83997282fc1a..f85472dda463 100644
--- a/trunk/fs/nfsd/nfsctl.c
+++ b/trunk/fs/nfsd/nfsctl.c
@@ -532,7 +532,9 @@ static ssize_t write_ports(struct file *file, char *buf, size_t size)
 			/* Decrease the count, but don't shutdown the
 			 * the service
 			 */
+			lock_kernel();
 			nfsd_serv->sv_nrthreads--;
+			unlock_kernel();
 		}
 		return err;
 	}