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Architectures that handle DMA-non-coherent memory need to set ARCH_KMALLOC_MINALIGN to make sure that kmalloc'ed buffer is DMA-safe: the buffer doesn't share a cache with the others. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
26 lines
773 B
C
26 lines
773 B
C
/* cache.h: FRV cache definitions
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*
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* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef __ASM_CACHE_H
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#define __ASM_CACHE_H
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/* bytes per L1 cache line */
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#define L1_CACHE_SHIFT (CONFIG_FRV_L1_CACHE_SHIFT)
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#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
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#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
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#define __cacheline_aligned __attribute__((aligned(L1_CACHE_BYTES)))
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#define ____cacheline_aligned __attribute__((aligned(L1_CACHE_BYTES)))
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#endif
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