Help out gcc. clang understands.

sys_generic.c:1510: warning: 'precision' may be used uninitialized
*** [sys_generic.o] Error code 1

sys/kern/sys_generic.c

@@ -1510,6 +1510,7 @@ selsocket(struct socket *so, int events, struct timeval *tvp, struct thread *td)
 	sbintime_t asbt, precision, rsbt;
 	int error;
 
+	precision = 0;	/* stupid gcc! */
 	if (tvp != NULL) {
 		rtv = *tvp;
 		if (rtv.tv_sec < 0 || rtv.tv_usec < 0 || 

sys/kern/vfs_init.c

@@ -201,6 +201,7 @@ vfs_register(struct vfsconf *vfc)
 	} else
 		vfc->vfc_typenum = maxvfsconf++;
 	TAILQ_INSERT_TAIL(&vfsconf, vfc, vfc_list);
+	vfc->vfc_flags |= VFCF_JAIL;
 
 	/*
 	 * If this filesystem has a sysctl node under vfs