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