Import backup from 2003-09-07

kernel.c

@@ -31,7 +31,7 @@ void k_init()
 	outportb(0x43, 0x34);
 	outportb(0x40, 0x9c); //lsb
 	outportb(0x40, 0x2e); //msb
-//	video_init((ModeInfoBlock *) 0x90306);
+	video_init((ModeInfoBlock *) 0x90306);
 	mm_init();
 	int a;
 	for (a=0; a<512; a++)

mm.c

@@ -162,6 +162,8 @@ int	mm_pfree(void *ptr)
 			pb->flags = MM_PB_AVAIL;		//found block, mark available / coalesce it
 			pageblock *pbc = first_pageblock;
 			for (;;)
+			{
+			    	if (pbc->flags == MM_PB_AVAIL)
 			    	{
 			    		if ((pbc->base + (pbc->length * 4096)) == pb->base)	//pbc ends where pb starts
 					{
@@ -175,6 +177,7 @@ int	mm_pfree(void *ptr)
 						pbc->flags = MM_PB_NP;
 						return 0;
 					}
+				 }
 				if (pbc->link == 0)			//no entry found to consolidate...
 					return 0;
 				pbc = (pageblock *) pbc->link;		//next entry to test