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Commit296e46db00("MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>.") claimed that the inclusion of the machine's kmalloc.h from asm/cache.h is unnecessary, but this is not true. Without including kmalloc.h we don't get a definition for ARCH_DMA_MINALIGN, which means we no longer suitably align DMA. Further to this the definition of ARCH_KMALLOC_MINALIGN provided by linux/slab.h ends up being set to the alignment of an unsigned long long value rather than to ARCH_DMA_MINALIGN, which means that buffers allocated using kmalloc may no longer be safely aligned for use with DMA. Fix this by re-adding the include of kmalloc.h in asm/cache.h. This reverts commit296e46db00("MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>.") Signed-off-by: Paul Burton <paul.burton@imgtec.com> Fixes:296e46db00("MIPS: Don't unnecessarily include kmalloc.h into <asm/cache.h>.") Cc: linux-mips@linux-mips.org Cc: stable <stable@vger.kernel.org> # v4.12+ Patchwork: https://patchwork.linux-mips.org/patch/16895/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
20 lines
546 B
C
20 lines
546 B
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1997, 98, 99, 2000, 2003 Ralf Baechle
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* Copyright (C) 1999 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_CACHE_H
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#define _ASM_CACHE_H
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#include <kmalloc.h>
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#define L1_CACHE_SHIFT CONFIG_MIPS_L1_CACHE_SHIFT
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#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
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#define __read_mostly __attribute__((__section__(".data..read_mostly")))
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#endif /* _ASM_CACHE_H */
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