| /* Fallback per-CPU frame pointer holder |
| * |
| * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #ifndef _ASM_GENERIC_IRQ_REGS_H |
| #define _ASM_GENERIC_IRQ_REGS_H |
| |
| #include <linux/percpu.h> |
| |
| /* |
| * Per-cpu current frame pointer - the location of the last exception frame on |
| * the stack |
| */ |
| DECLARE_PER_CPU(struct pt_regs *, __irq_regs); |
| |
| static inline struct pt_regs *get_irq_regs(void) |
| { |
| return __get_cpu_var(__irq_regs); |
| } |
| |
| static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) |
| { |
| struct pt_regs *old_regs, **pp_regs = &__get_cpu_var(__irq_regs); |
| |
| old_regs = *pp_regs; |
| *pp_regs = new_regs; |
| return old_regs; |
| } |
| |
| #endif /* _ASM_GENERIC_IRQ_REGS_H */ |