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 | */ |
17 | DECLARE_PER_CPU(struct pt_regs *, __irq_regs); |
18 | |
19 | static inline struct pt_regs *get_irq_regs(void) |
20 | { |
21 | return __this_cpu_read(__irq_regs); |
22 | } |
23 | |
24 | static 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 |