arch/x86/include/asm/irq_regs.h

   1 /*
   2  * Per-cpu current frame pointer - the location of the last exception frame on
   3  * the stack, stored in the per-cpu area.
   4  *
   5  * Jeremy Fitzhardinge <jeremy@goop.org>
   6  */
   7 #ifndef _ASM_X86_IRQ_REGS_H
   8 #define _ASM_X86_IRQ_REGS_H
   9
  10 #include <asm/percpu.h>
  11
  12 #define ARCH_HAS_OWN_IRQ_REGS
  13
  14 DECLARE_PER_CPU(struct pt_regs *, irq_regs);
  15
  16 static inline struct pt_regs *get_irq_regs(void)
  17 {
  18         return percpu_read(irq_regs);
  19 }
  20
  21 static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
  22 {
  23         struct pt_regs *old_regs;
  24
  25         old_regs = get_irq_regs();
  26         percpu_write(irq_regs, new_regs);
  27
  28         return old_regs;
  29 }
  30
  31 #endif /* _ASM_X86_IRQ_REGS_32_H */