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Subject[tip:x86/mm] x86: Ioremap: fix wrong physical address handling in PAT code
Commit-ID:  3709c857350976408953831f0cf89d19951394a1
Author: Yasuaki Ishimatsu <>
AuthorDate: Thu, 22 Jul 2010 14:57:35 +0900
Committer: Thomas Gleixner <>
CommitDate: Thu, 29 Jul 2010 15:26:11 +0200

x86: Ioremap: fix wrong physical address handling in PAT code

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 <>
Reviewed-by: Kenji Kaneshige <>
LKML-Reference: <>
Signed-off-by: Thomas Gleixner <>

arch/x86/mm/pat.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index acc15b2..03b48c8 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -158,7 +158,7 @@ static unsigned long pat_x_mtrr_type(u64 start, u64 end, unsigned long req_type)
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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