mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2025-10-30 21:44:27 -04:00
34 lines
1.0 KiB
Diff
34 lines
1.0 KiB
Diff
From fa27f3e27863e3f4376864b144dc7506de124cf6 Mon Sep 17 00:00:00 2001
|
|
From: Jason Jin <Jason.jin@freescale.com>
|
|
Date: Thu, 4 Aug 2011 09:59:54 +0800
|
|
Subject: [PATCH 43/52] workaround for zero page used on ColdFire platform.
|
|
|
|
There is some issue for Coldfire platform to use the
|
|
zero page for read when there is memory fault. This is
|
|
a workaround for this, try to make kernel to use normal
|
|
memory instead.
|
|
|
|
Signed-off-by: Jason Jin <Jason.jin@freescale.com>
|
|
---
|
|
mm/memory.c | 2 ++
|
|
1 files changed, 2 insertions(+), 0 deletions(-)
|
|
|
|
--- a/mm/memory.c
|
|
+++ b/mm/memory.c
|
|
@@ -2937,6 +2937,7 @@ static int do_anonymous_page(struct mm_s
|
|
if (check_stack_guard_page(vma, address) < 0)
|
|
return VM_FAULT_SIGBUS;
|
|
|
|
+#ifndef CONFIG_COLDFIRE
|
|
/* Use the zero-page for reads */
|
|
if (!(flags & FAULT_FLAG_WRITE)) {
|
|
entry = pte_mkspecial(pfn_pte(my_zero_pfn(address),
|
|
@@ -2946,6 +2947,7 @@ static int do_anonymous_page(struct mm_s
|
|
goto unlock;
|
|
goto setpte;
|
|
}
|
|
+#endif
|
|
|
|
/* Allocate our own private page. */
|
|
if (unlikely(anon_vma_prepare(vma)))
|