1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2006 Andi Kleen, SUSE Labs.
 
 4 *
 5 * Fast user context implementation of getcpu()
 6 */
 7
 8#include <linux/kernel.h>
 9#include <linux/getcpu.h>
10#include <linux/time.h>
11#include <asm/vgtod.h>
12
13notrace long
14__vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused)
15{
16	vdso_read_cpunode(cpu, node);
17
 
 
 
 
 
 
18	return 0;
19}
20
21long getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
22	__attribute__((weak, alias("__vdso_getcpu")));

 
 1/*
 2 * Copyright 2006 Andi Kleen, SUSE Labs.
 3 * Subject to the GNU Public License, v.2
 4 *
 5 * Fast user context implementation of getcpu()
 6 */
 7
 8#include <linux/kernel.h>
 9#include <linux/getcpu.h>
10#include <linux/time.h>
11#include <asm/vgtod.h>
12
13notrace long
14__vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused)
15{
16	unsigned int p;
17
18	p = __getcpu();
19
20	if (cpu)
21		*cpu = p & VGETCPU_CPU_MASK;
22	if (node)
23		*node = p >> 12;
24	return 0;
25}
26
27long getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
28	__attribute__((weak, alias("__vdso_getcpu")));