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Subject[PATCH] x86: ioremap: fix wrong physical address handling in PAT code
From: Yasuaki Ishimatsu <>

The following two commits fixed a problem that x86 ioremap() doesn't handle
physical address higher than 32-bit properly in X86_32 PAE mode.

ffa71f33a820d1ab3f2fc5723819ac60fb76080b (x86, ioremap: Fix incorrect physical address handling in
PAE mode)
35be1b716a475717611b2dc04185e9d80b9cb693 (x86, ioremap: Fix normal ram range check)

But these fixes are not enough, since pat_pagerange_is_ram() in PAT code
also has a same problem. This patch fixes it.

Signed-off-by: Yasuaki Ishimatsu <>


It is for -tip tree.

Index: linux-2.6-x86/arch/x86/mm/pat.c
--- linux-2.6-x86.orig/arch/x86/mm/pat.c 2010-07-22 03:04:38.000000000 +0900
+++ linux-2.6-x86/arch/x86/mm/pat.c 2010-07-22 03:47:36.000000000 +0900
@@ -158,7 +158,7 @@ static unsigned long pat_x_mtrr_type(u64
return req_type;

-static int pat_pagerange_is_ram(unsigned long start, unsigned long end)
+static int pat_pagerange_is_ram(resource_size_t start, resource_size_t end)
int ram_page = 0, not_rampage = 0;
unsigned long page_nr;

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