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eb5f4ca953
Define ARCH_KMALLOC_MINALIGN in asm/cache.h At the request of Russell also move ARCH_SLAB_MINALIGN to this file. Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
27 lines
680 B
C
27 lines
680 B
C
/*
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* arch/arm/include/asm/cache.h
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*/
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#ifndef __ASMARM_CACHE_H
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#define __ASMARM_CACHE_H
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#define L1_CACHE_SHIFT 5
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#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
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/*
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* Memory returned by kmalloc() may be used for DMA, so we must make
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* sure that all such allocations are cache aligned. Otherwise,
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* unrelated code may cause parts of the buffer to be read into the
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* cache before the transfer is done, causing old data to be seen by
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* the CPU.
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*/
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#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
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/*
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* With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
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*/
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#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
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#define ARCH_SLAB_MINALIGN 8
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#endif
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#endif
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