/* 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 __this_cpu_read(__irq_regs); } static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) { struct pt_regs *old_regs; old_regs = __this_cpu_read(__irq_regs); __this_cpu_write(__irq_regs, new_regs); return old_regs; } #endif /* _ASM_GENERIC_IRQ_REGS_H */