From b14b4318bf069340cbedff3f3939b56fe514376c Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 9 Apr 1993 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1993-04-09

---
 pc/bbmalloc.c | 15 +++++++++------
 pc/devvga.c   |  2 +-
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/pc/bbmalloc.c b/pc/bbmalloc.c
index f1087f1dc9325cf89b950fb25832d96bbf63e425..f216af964a4d112913363f2496a24f6b57326dfc 100644
--- a/pc/bbmalloc.c
+++ b/pc/bbmalloc.c
@@ -19,8 +19,8 @@ enum {
 };
 
 static ulong	*bbarena[narena];
-static ulong	*bbcur[narena] = {&bbarena[0][0], &bbarena[1][0]};
-static ulong	*bblast[narena] = {0, 0};
+static ulong	*bbcur[narena];
+static ulong	*bblast[narena];
 
 #define INTENABLED(v)	((v)&(1<<9))
 void *
@@ -33,13 +33,13 @@ bbmalloc(int nbytes)
 	nw = nbytes/sizeof(long);
 	s = splhi();
 	a = INTENABLED(s) ? 0 : 1;
-	if(bbcur[a] + nw > &bbarena[a][nbbarena])
+	if(bbcur[a] + nw > bbarena[a] + nbbarena)
 		ans = bbarena[a];
 	else
 		ans = bbcur[a];
 	bbcur[a] = ans + nw;
-	splx(s);
 	bblast[a] = ans;
+	splx(s);
 	return ans;
 }
 
@@ -50,8 +50,11 @@ bbinit(void)
 
 	if(bbarena[0])
 		return;
-	for(i = 0; i < narena; i++)
-		bbarena[i] = xalloc(nbbarena);
+	for(i = 0; i < narena; i++){
+		bbarena[i] = xalloc(nbbarena * sizeof(long));
+		bbcur[i] = bbarena[i];
+		bblast[i] = 0;
+	}
 }
 
 
diff --git a/pc/devvga.c b/pc/devvga.c
index e38ebf8cf40b77bbc766057a33231482c0ae1e30..2eb005a2d66746f5ec51e12fdc7e2cebf8c6113e 100644
--- a/pc/devvga.c
+++ b/pc/devvga.c
@@ -293,7 +293,6 @@ vgawrite(Chan *c, void *buf, long n, ulong offset)
 		|| ldepth > 3 || ldepth < 0)
 			error(Ebadarg);
 		cursoroff(1);
-		bbinit();
 		setscreen(maxx, maxy, ldepth);
 		cursoron(1);
 		return n;
@@ -562,6 +561,7 @@ setscreen(int maxx, int maxy, int ldepth)
 		gscreen.ldepth = ldepth;
 		break;
 	}
+	bbinit();
 	cga = 0;
 
 	/*