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    Subject[patch 17/85] x86: default to SWIOTLB=y on x86_64
    2.6.27-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Joerg Roedel <joerg.roedel@amd.com>

    commit a1afd01c175324656d0e8f1c82ea94b474953c04 upstream.

    Impact: fixes korg bugzilla 11980

    A kernel for a 64bit x86 system should always contain the swiotlb code
    in case it is booted on a machine without any hardware IOMMU supported
    by the kernel and more than 4GB of RAM. This patch changes Kconfig to
    always compile swiotlb into the kernel for x86_64.

    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    arch/x86/Kconfig | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/x86/Kconfig
    +++ b/arch/x86/Kconfig
    @@ -567,7 +567,7 @@ config AMD_IOMMU

    # need this always selected by IOMMU for the VIA workaround
    config SWIOTLB
    - bool
    + def_bool y if X86_64
    help
    Support for software bounce buffers used on x86-64 systems
    which don't have a hardware IOMMU (e.g. the current generation


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