1// SPDX-License-Identifier: GPL-2.0
 2#include "cacheline.h"
 3#include <unistd.h>
 4
 5#ifdef _SC_LEVEL1_DCACHE_LINESIZE
 6#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
 7#else
 8#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#endif
16
17int cacheline_size(void)
18{
19	static int size;
20
21	if (!size)
22		cache_line_size(&size);
23
24	return size;
25}

 1// SPDX-License-Identifier: GPL-2.0
 2#include "cacheline.h"
 3#include <unistd.h>
 4
 5#ifdef _SC_LEVEL1_DCACHE_LINESIZE
 6#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
 7#else
 8#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#endif
16
17int cacheline_size(void)
18{
19	static int size;
20
21	if (!size)
22		cache_line_size(&size);
23
24	return size;
25}