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1// SPDX-License-Identifier: GPL-2.02#include "cacheline.h"3#include <unistd.h>4 5#ifdef _SC_LEVEL1_DCACHE_LINESIZE6#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)7#else8#include <api/fs/fs.h>9#include "debug.h"10static void cache_line_size(int *cacheline_sizep)11{12 if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))13 pr_debug("cannot determine cache line size");14}15#endif16 17int cacheline_size(void)18{19 static int size;20 21 if (!size)22 cache_line_size(&size);23 24 return size;25}26