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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;

     \ /
      Last update: 2010-07-29 15:31    [W:0.030 / U:71.264 seconds]
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