arch/x86/include/asm/irq_regs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Per-cpu current frame pointer - the location of the last exception frame on
   4  * the stack, stored in the per-cpu area.
   5  *
   6  * Jeremy Fitzhardinge <jeremy@goop.org>
   7  */
   8 #ifndef _ASM_X86_IRQ_REGS_H
   9 #define _ASM_X86_IRQ_REGS_H
  10
  11 #include <asm/percpu.h>
  12
  13 #define ARCH_HAS_OWN_IRQ_REGS
  14
  15 DECLARE_PER_CPU(struct pt_regs *, irq_regs);
  16
  17 static inline struct pt_regs *get_irq_regs(void)
  18 {
  19         return __this_cpu_read(irq_regs);
  20 }
  21
  22 static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
  23 {
  24         struct pt_regs *old_regs;
  25
  26         old_regs = get_irq_regs();
  27         __this_cpu_write(irq_regs, new_regs);
  28
  29         return old_regs;
  30 }
  31
  32 #endif /* _ASM_X86_IRQ_REGS_32_H */