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    SubjectRe: [PATCH 5/7] [RFC] force 32-byte aligned kmallocs
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    On Wed, 2011-05-18 at 16:24 -0500, Eric Van Hensbergen wrote:
    > For BGP, it is convenient for 'kmalloc' to come back with 32-byte
    > aligned units for torus DMA
    >
    > Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
    > ---
    > arch/powerpc/include/asm/page_32.h | 2 +-
    > 1 files changed, 1 insertions(+), 1 deletions(-)
    >
    > diff --git a/arch/powerpc/include/asm/page_32.h b/arch/powerpc/include/asm/page_32.h
    > index 68d73b2..fb0a7ae 100644
    > --- a/arch/powerpc/include/asm/page_32.h
    > +++ b/arch/powerpc/include/asm/page_32.h
    > @@ -9,7 +9,7 @@
    >
    > #define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
    >
    > -#ifdef CONFIG_NOT_COHERENT_CACHE
    > +#if defined(CONFIG_NOT_COHERENT_CACHE) || defined(CONFIG_BGP)
    > #define ARCH_DMA_MINALIGN L1_CACHE_BYTES
    > #endif

    Is DMA cache coherent on BG/P ? That's odd for a 4xx base :-)

    Cheers,
    Ben.





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