tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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")));