Re: [PATCH 5/7] [RFC] force 32-byte aligned kmallocs
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2011-05-20 01:59:51
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On Wed, 2011-05-18 at 16:24 -0500, Eric Van Hensbergen wrote:
quoted hunk ↗ jump to hunk
For BGP, it is convenient for 'kmalloc' to come back with 32-byte aligned units for torus DMA Signed-off-by: Eric Van Hensbergen <redacted> --- 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.