From 30dac21d0a0fb2e87b1ae634ae1eca7995d374c4 Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 11 Jul 2013 05:15:30 +0000
Subject: [PATCH] Explicitely panic instead of possibly doing undefined things
 when ptelist KVA is exhausted.  Currently this cannot happen, the added panic
 serves as assert.

Discussed with:	alc
Sponsored by:	The FreeBSD Foundation
---
 sys/i386/i386/pmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c
index c1fe3807b318..955645805fc7 100644
--- a/sys/i386/i386/pmap.c
+++ b/sys/i386/i386/pmap.c
@@ -680,7 +680,7 @@ pmap_ptelist_alloc(vm_offset_t *head)
 
 	va = *head;
 	if (va == 0)
-		return (va);	/* Out of memory */
+		panic("pmap_ptelist_alloc: exhausted ptelist KVA");
 	pte = vtopte(va);
 	*head = *pte;
 	if (*head & PG_V)