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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /include/asm-generic/irq_regs.h |
Initial import
Diffstat (limited to 'include/asm-generic/irq_regs.h')
-rw-r--r-- | include/asm-generic/irq_regs.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/include/asm-generic/irq_regs.h b/include/asm-generic/irq_regs.h new file mode 100644 index 000000000..6bf9355fa --- /dev/null +++ b/include/asm-generic/irq_regs.h @@ -0,0 +1,37 @@ +/* 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 */ |