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| author | Jeff Garzik <jeff@garzik.org> | 2006-10-11 09:56:12 +0200 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-10-11 09:56:12 +0200 |
| commit | 24fcbacedb0d83cabc6761acbecfbf751265ce52 (patch) | |
| tree | 7147b206304b028c3cfd5de6317e5c8510098ca9 /include/asm-generic/irq_regs.h | |
| parent | [netdrvr] b44: handle excessive multicast groups (diff) | |
| parent | ACPI: Allow setting SCI_EN bit in PM1_CONTROL register (diff) | |
| download | linux-24fcbacedb0d83cabc6761acbecfbf751265ce52.tar.xz linux-24fcbacedb0d83cabc6761acbecfbf751265ce52.zip | |
Merge branch 'master' into upstream-fixes
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 000000000000..5ae1d07d4a12 --- /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 __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 */ |