From 75282af77799d7a1e7064564dd97add41bf5d088 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 16 Aug 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-08-16

---
 port/page.c    | 10 ++++++++++
 port/portdat.h |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/port/page.c b/port/page.c
index 5faff2a23636f52b85c743be40ee78507cad81c0..aa28157b754d6272fb317a2f828e22dddfea6859 100644
--- a/port/page.c
+++ b/port/page.c
@@ -114,6 +114,12 @@ retry:
 		unlock(p);
 		goto retry;
 	}
+
+if(p->log == 0) {
+	p->log = smalloc(8192);
+	p->lptr = 0;
+}
+
 	uncachepage(p);
 	p->ref++;
 	p->va = va;
@@ -228,6 +234,10 @@ duppage(Page *p)				/* Always call with p locked */
 		unlock(np);
 		return;
 	}
+if(np->log == 0) {
+	np->log = smalloc(8192);
+	np->lptr = 0;
+}
 	
 	uncachepage(np);
 	np->va = p->va;
diff --git a/port/portdat.h b/port/portdat.h
index 84245f6de1ccabadf88151b2f8188f364b5aea8f..42ea48a8fd5c31c5b9110772f33fd6d54ae1330b 100644
--- a/port/portdat.h
+++ b/port/portdat.h
@@ -311,6 +311,9 @@ struct Page
 	Page	*next;			/* Lru free list */
 	Page	*prev;
 	Page	*hash;			/* Image hash chains */
+
+	uchar	*log;
+	int	lptr;
 };
 
 struct Swapalloc