From 1d161cb2d4028073315aea9c01d2f2a76ebb814f Mon Sep 17 00:00:00 2001
From: jdolecek <jdolecek@NetBSD.org>
Date: Thu, 20 Sep 2001 19:09:13 +0000
Subject: [PATCH] call pmap_update() after pmap_enter()s ALWAYS call
 uvm_unloanpage() in cleanup - it's necessary even in pipe_loan_free() case,
 since uvm_km_free() doesn't seem to implicitly unloan the loaned pages

---
 sys/kern/sys_pipe.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sys/kern/sys_pipe.c b/sys/kern/sys_pipe.c
index dc44c77a1b2e..18dc35e12614 100644
--- a/sys/kern/sys_pipe.c
+++ b/sys/kern/sys_pipe.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: sys_pipe.c,v 1.11 2001/07/26 14:14:28 jdolecek Exp $	*/
+/*	$NetBSD: sys_pipe.c,v 1.12 2001/09/20 19:09:13 jdolecek Exp $	*/
 
 /*
  * Copyright (c) 1996 John S. Dyson
@@ -1060,6 +1060,7 @@ retry:
 	for(j=0; j < npages; j++, kva += PAGE_SIZE)
 		pmap_enter(pmap_kernel(), kva, res[j]->phys_addr,
 			VM_PROT_READ, 0);
+	pmap_update(pmap_kernel());
 
 	wpipe->pipe_state |= PIPE_DIRECTW;
 	error = 0;
@@ -1081,10 +1082,10 @@ retry:
 
     cleanup:
 	pipelock(wpipe, 0);
+	if (res)
+		uvm_unloanpage(res, npages);
 	if (error || amountpipekva > maxpipekva)
 		pipe_loan_free(wpipe);
-	else if (res)
-		uvm_unloanpage(res, npages);
 	pipeunlock(wpipe);
 
 	if (error == EPIPE) {