diff options
Diffstat (limited to 'arch/x86/include/asm/irq_regs_32.h')
| -rw-r--r-- | arch/x86/include/asm/irq_regs_32.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/x86/include/asm/irq_regs_32.h b/arch/x86/include/asm/irq_regs_32.h new file mode 100644 index 000000000000..316a3b258871 --- /dev/null +++ b/arch/x86/include/asm/irq_regs_32.h @@ -0,0 +1,29 @@ +/* + * Per-cpu current frame pointer - the location of the last exception frame on + * the stack, stored in the per-cpu area. + * + * Jeremy Fitzhardinge <jeremy@goop.org> + */ +#ifndef ASM_X86__IRQ_REGS_32_H +#define ASM_X86__IRQ_REGS_32_H + +#include <asm/percpu.h> + +DECLARE_PER_CPU(struct pt_regs *, irq_regs); + +static inline struct pt_regs *get_irq_regs(void) +{ + return x86_read_percpu(irq_regs); +} + +static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) +{ + struct pt_regs *old_regs; + + old_regs = get_irq_regs(); + x86_write_percpu(irq_regs, new_regs); + + return old_regs; +} + +#endif /* ASM_X86__IRQ_REGS_32_H */ |