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    Subject[tip:x86/urgent] Revert "x86: cap iomem_resource to addressable physical memory"
    Commit-ID:  fc1dbec8ae1a451557ade978bf7777b267690ca9
    Gitweb: http://git.kernel.org/tip/fc1dbec8ae1a451557ade978bf7777b267690ca9
    Author: H. Peter Anvin <hpa@zytor.com>
    AuthorDate: Sat, 27 Jun 2009 12:22:27 -0700
    Committer: H. Peter Anvin <hpa@zytor.com>
    CommitDate: Sat, 27 Jun 2009 12:22:27 -0700

    Revert "x86: cap iomem_resource to addressable physical memory"

    This reverts commit 95ee14e4379c5e19c0897c872350570402014742.
    Mikael Petterson <mikpe@it.uu.se> reported that at least one of his
    systems will not boot as a result. We have ruled out the detection
    algorithm malfunctioning, so it is not a matter of producing the
    incorrect bitmasks; rather, something in the application of them
    fails.

    Revert the commit until we can root cause and correct this problem.

    -stable team: this means the underlying commit should be rejected.

    Reported-and-isolated-by: Mikael Petterson <mikepe@it.uu.se>
    Signed-off-by: H. Peter Anvin <hpa@zytor.com>
    LKML-Reference: <200906261559.n5QFxJH8027336@pilspetsen.it.uu.se>
    Cc: stable@kernel.org
    Cc: Grant Grundler <grundler@parisc-linux.org>


    ---
    arch/x86/kernel/cpu/common.c | 3 ---
    1 files changed, 0 insertions(+), 3 deletions(-)

    diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
    index 6b26d4d..f1961c0 100644
    --- a/arch/x86/kernel/cpu/common.c
    +++ b/arch/x86/kernel/cpu/common.c
    @@ -848,9 +848,6 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
    #if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
    numa_add_cpu(smp_processor_id());
    #endif
    -
    - /* Cap the iomem address space to what is addressable on all CPUs */
    - iomem_resource.end &= (1ULL << c->x86_phys_bits) - 1;
    }

    #ifdef CONFIG_X86_64

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