[mirror_ubuntu-bionic-kernel.git] / include / asm-generic / irq_regs.h

/* 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 */
Commit	Line	Data
7d12e780 DH	1	/* Fallback per-CPU frame pointer holder
	2	*
	3	* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
	12	#ifndef _ASM_GENERIC_IRQ_REGS_H
	13	#define _ASM_GENERIC_IRQ_REGS_H
	14
	15	#include <linux/percpu.h>
	16
	17	/*
	18	* Per-cpu current frame pointer - the location of the last exception frame on
	19	* the stack
	20	*/
	21	DECLARE_PER_CPU(struct pt_regs *, __irq_regs);
	22
	23	static inline struct pt_regs *get_irq_regs(void)
	24	{
909ea964	25	return __this_cpu_read(__irq_regs);
7d12e780 DH	26	}
	27
	28	static inline struct pt_regs set_irq_regs(struct pt_regs new_regs)
	29	{
909ea964	30	struct pt_regs *old_regs;
7d12e780	31
909ea964 CL	32	old_regs = __this_cpu_read(__irq_regs);
909ea964 CL	33	__this_cpu_write(__irq_regs, new_regs);
7d12e780 DH	34	return old_regs;
	35	}
	36
	37	#endif /* _ASM_GENERIC_IRQ_REGS_H */