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Date: Wed, 28 May 2008 15:36:34 +0100 From: David Howells <dhowells@...hat.com> To: torvalds@...l.org, akpm@...ux-foundation.org Cc: penberg@...helsinki.fi, dhowells@...hat.com, linux-kernel@...r.kernel.org Subject: [PATCH] FRV: Specify the minimum slab/kmalloc alignment From: David Howells <dhowells@...hat.com> Specify the minimum slab/kmalloc alignment to be 8 bytes. This fixes a crash when SLOB is selected as the memory allocator. The FRV arch needs this so that it can use the load- and store-double instructions without faulting. By default SLOB sets the minimum to be 4 bytes. Signed-off-by: David Howells <dhowells@...hat.com> --- include/asm-frv/mem-layout.h | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/include/asm-frv/mem-layout.h b/include/asm-frv/mem-layout.h index 734a1d0..8a15c90 100644 --- a/include/asm-frv/mem-layout.h +++ b/include/asm-frv/mem-layout.h @@ -31,6 +31,13 @@ #define PAGE_MASK (~(PAGE_SIZE-1)) +/* + * the slab must be aligned such that load- and store-double instructions don't + * fault if used + */ +#define ARCH_KMALLOC_MINALIGN (sizeof(long) * 2) +#define ARCH_SLAB_MINALIGN (sizeof(long) * 2) + /*****************************************************************************/ /* * virtual memory layout from kernel's point of view -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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