---

yaml
---
r: 43078
b: refs/heads/master
c: bd472c7
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: da181a8b3916aa7f2e3c5775d2bd2fe3454cf82d
+refs/heads/master: bd472c794bbf6771c3fc1c58f188bc16c393d2fe

trunk/arch/i386/kernel/e820.c

@@ -9,6 +9,7 @@
 #include <linux/mm.h>
 #include <linux/efi.h>
 #include <linux/pfn.h>
+#include <linux/uaccess.h>
 
 #include <asm/pgtable.h>
 #include <asm/page.h>
@@ -155,7 +156,14 @@ static struct resource standard_io_resources[] = { {
 	.flags	= IORESOURCE_BUSY | IORESOURCE_IO
 } };
 
-#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
+static int romsignature(const unsigned char *x)
+{
+	unsigned short sig;
+	int ret = 0;
+	if (probe_kernel_address((const unsigned short *)x, sig) == 0)
+		ret = (sig == 0xaa55);
+	return ret;
+}
 
 static int __init romchecksum(unsigned char *rom, unsigned long length)
 {

trunk/arch/i386/pci/pcbios.c

@@ -5,6 +5,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/uaccess.h>
 #include "pci.h"
 #include "pci-functions.h"
 
@@ -314,6 +315,10 @@ static struct pci_raw_ops * __devinit pci_find_bios(void)
 	for (check = (union bios32 *) __va(0xe0000);
 	     check <= (union bios32 *) __va(0xffff0);
 	     ++check) {
+		long sig;
+		if (probe_kernel_address(&check->fields.signature, sig))
+			continue;
+
 		if (check->fields.signature != BIOS32_SIGNATURE)
 			continue;
 		length = check->fields.length * 16;
@@ -331,11 +336,13 @@ static struct pci_raw_ops * __devinit pci_find_bios(void)
 		}
 		DBG("PCI: BIOS32 Service Directory structure at 0x%p\n", check);
 		if (check->fields.entry >= 0x100000) {
-			printk("PCI: BIOS32 entry (0x%p) in high memory, cannot use.\n", check);
+			printk("PCI: BIOS32 entry (0x%p) in high memory, "
+					"cannot use.\n", check);
 			return NULL;
 		} else {
 			unsigned long bios32_entry = check->fields.entry;
-			DBG("PCI: BIOS32 Service Directory entry at 0x%lx\n", bios32_entry);
+			DBG("PCI: BIOS32 Service Directory entry at 0x%lx\n",
+					bios32_entry);
 			bios32_indirect.address = bios32_entry + PAGE_OFFSET;
 			if (check_pcibios())
 				return &pci_bios_access;