From a8fa9ba623122a51efe6c9ef8fe7412c91582d48 Mon Sep 17 00:00:00 2001
From: Kevin Hilman <khilman@mvista.com>
Date: Thu, 8 Nov 2007 01:48:16 +0100
Subject: [ARM] 4644/2: fix flush_kern_tlb_range() in module space
For kernel addresses between TASK_SIZE and PAGE_OFFSET,
flush_tlb_kern_range() does not work as would be expected.
The TLB invalidate works with a matching ASID, or on entries marked as
global. The set_pte_at() macro marks addresses >= PAGE_OFFSET as
global, but not addresses from TASK_SIZE to PAGE_OFFSET, which are
also kernel addresses.
The result is that the entries in this range are not actually
invalidated by flush_tlb_kern_range().
This patch instead marks addresses >= TASK_SIZE as global.
Signed-off-by: Satoru Fujii <s-fujii@ct.jp.nec.com>
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
include/asm-arm/pgtable.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'include/asm-arm/pgtable.h')
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index d2e8171..5e01824 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -249,7 +249,7 @@ extern struct page *empty_zero_page;
#define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,pte,ext)
#define set_pte_at(mm,addr,ptep,pteval) do { \
- set_pte_ext(ptep, pteval, (addr) >= PAGE_OFFSET ? 0 : PTE_EXT_NG); \
+ set_pte_ext(ptep, pteval, (addr) >= TASK_SIZE ? 0 : PTE_EXT_NG); \
} while (0)
/*
--
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