arch/x86/entry/vdso/vgetcpu.c

   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 <asm/segment.h>
  11 #include <vdso/processor.h>
  12
  13 notrace 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
  21 long getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
  22         __attribute__((weak, alias("__vdso_getcpu")));