From: Haavard Skinnemoen <hskinnemoen@atmel.com>
Date: Wed, 13 Feb 2008 11:32:34 +0000 (+0100)
Subject: avr32: Fix broken pte dump code in do_page_fault()
X-Git-Tag: v2.6.25-rc4~143^2~3
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=32019828d9012e584017a824f84798248c0060dd;p=linux-2.6

avr32: Fix broken pte dump code in do_page_fault()

The per-task page tables only cover the first 2GiB of the address
space. For kernel addresses, we need to do the lookup in init's page
tables.

This is a temporary workaround until we modify the per-task page
tables to cover the whole 4GiB address space.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
---

diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c
index 6560cb18b4..ce4e4296b9 100644
--- a/arch/avr32/mm/fault.c
+++ b/arch/avr32/mm/fault.c
@@ -189,6 +189,8 @@ no_context:
 
 	page = sysreg_read(PTBR);
 	printk(KERN_ALERT "ptbr = %08lx", page);
+	if (address >= TASK_SIZE)
+		page = (unsigned long)swapper_pg_dir;
 	if (page) {
 		page = ((unsigned long *)page)[address >> 22];
 		printk(" pgd = %08lx", page);