---

yaml --- r: 80522 b: refs/heads/master c: 950f9d9 h: refs/heads/master v: v3
git-mirror · Jan 30, 2008 · 7ca6ca3 · 7ca6ca3
1 parent 496542c
commit 7ca6ca3
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Showing 4 changed files with 15 additions and 12 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5f5192b9feeff6a96c97c143c3ca558fdbe2dc8e
+refs/heads/master: 950f9d95bed1a366434d3597ea75f5b9d772d74f
diff --git a/trunk/arch/x86/mm/ioremap.c b/trunk/arch/x86/mm/ioremap.c
@@ -42,13 +42,18 @@ int page_is_ram(unsigned long pagenr)
 		 */
 		if (e820.map[i].type != E820_RAM)
 			continue;
-		/*
-		 *	!!!FIXME!!! Some BIOSen report areas as RAM that
-		 *	are not. Notably the 640->1Mb area. We need a sanity
-		 *	check here.
-		 */
 		addr = (e820.map[i].addr + PAGE_SIZE-1) >> PAGE_SHIFT;
 		end = (e820.map[i].addr + e820.map[i].size) >> PAGE_SHIFT;
+
+		/*
+		 * Sanity check: Some BIOSen report areas as RAM that
+		 * are not. Notably the 640->1Mb area, which is the
+		 * PCI BIOS area.
+		 */
+		if (addr >= (BIOS_BEGIN >> PAGE_SHIFT) &&
+		    end < (BIOS_END >> PAGE_SHIFT))
+			continue;
+
 		if ((pagenr >= addr) && (pagenr < end))
 			return 1;
 	}

diff --git a/trunk/arch/x86/mm/pageattr.c b/trunk/arch/x86/mm/pageattr.c
@@ -9,18 +9,13 @@
 #include <linux/slab.h>
 #include <linux/mm.h>
 
+#include <asm/e820.h>
 #include <asm/processor.h>
 #include <asm/tlbflush.h>
 #include <asm/sections.h>
 #include <asm/uaccess.h>
 #include <asm/pgalloc.h>
 
-/*
- * We must allow the BIOS range to be executable:
- */
-#define BIOS_BEGIN		0x000a0000
-#define BIOS_END		0x00100000
-
 static inline int
 within(unsigned long addr, unsigned long start, unsigned long end)
 {

diff --git a/trunk/include/asm-x86/e820.h b/trunk/include/asm-x86/e820.h
@@ -25,6 +25,9 @@ struct e820map {
 #define ISA_START_ADDRESS	0xa0000
 #define ISA_END_ADDRESS		0x100000
 
+#define BIOS_BEGIN		0x000a0000
+#define BIOS_END		0x00100000
+
 #ifdef __KERNEL__
 #ifdef CONFIG_X86_32
 # include "e820_32.h"