LXR linux/include/asm-generic/irq

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/* Fallback per-CPU frame pointer holder
   3 *
   4 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
   5 * Written by David Howells (dhowells@redhat.com)
   6 */
   7
   8#ifndef _ASM_GENERIC_IRQ_REGS_H
   9#define _ASM_GENERIC_IRQ_REGS_H
  10
  11#include <linux/percpu.h>
  12
  13/*
  14 * Per-cpu current frame pointer - the location of the last exception frame on
  15 * the stack
  16 */
  17DECLARE_PER_CPU(struct pt_regs *, __irq_regs);
  18
  19static inline struct pt_regs *get_irq_regs(void)
  20{
  21        return __this_cpu_read(__irq_regs);
  22}
  23
  24static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
  25{
  26        struct pt_regs *old_regs;
  27
  28        old_regs = __this_cpu_read(__irq_regs);
  29        __this_cpu_write(__irq_regs, new_regs);
  30        return old_regs;
  31}
  32
  33#endif /* _ASM_GENERIC_IRQ_REGS_H */
  34