original_kernel/include/asm-x86_64/cache.h

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/*
* include/asm-x8664/cache.h
*/
#ifndef __ARCH_X8664_CACHE_H
#define __ARCH_X8664_CACHE_H
#include <linux/config.h>
/* L1 cache line size */
#define L1_CACHE_SHIFT (CONFIG_X86_L1_CACHE_SHIFT)
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
#define L1_CACHE_SHIFT_MAX 6 /* largest L1 which this arch supports */
#endif