Re: [PATCH -mm 0/6] ARCH_KMALLOC_MINALIGN fixes

[Pekka Enberg]

On Thu, May 20, 2010 at 6:21 AM, FUJITA Tomonori
<fujita.tomonori@xxxxxxxxxxxxx> wrote:
> As DMA-API-HOWTO says, kmalloc'ed buffer must be DMA-safe. Drivers and
> subsystems depend on it.
>
> So architectures that handle DMA-non-coherent memory need to set
> ARCH_KMALLOC_MINALIGN: the kmalloc'ed buffer doesn't share a cache
> with the others. Otherwise, we hit memory corruption due to DMA.
>
> I had a quick look at all the architectures. Seems that some
> architectures that need to set ARCH_KMALLOC_MINALIGN don't do.

Acked-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>

for the whole series.

>
> =
>  arch/blackfin/include/asm/cache.h |    2 ++
>  arch/frv/include/asm/cache.h      |    2 ++
>  arch/m68k/include/asm/cache.h     |    2 ++
>  arch/mn10300/include/asm/cache.h  |    2 ++
>  arch/parisc/include/asm/cache.h   |    2 ++
>  arch/xtensa/include/asm/cache.h   |    1 +
>  6 files changed, 11 insertions(+), 0 deletions(-)
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