Messages in this thread | | | Date | Thu, 20 May 2010 07:50:05 +0300 | Subject | Re: [PATCH -mm 0/6] ARCH_KMALLOC_MINALIGN fixes | From | Pekka Enberg <> |
| |
On Thu, May 20, 2010 at 6:21 AM, FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> 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@cs.helsinki.fi>
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(-) > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |