irq_regs.h
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/* 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 */