irq_regs.h 773 B

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /* Fallback per-CPU frame pointer holder
  3. *
  4. * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  5. * Written by David Howells (dhowells@redhat.com)
  6. */
  7. #ifndef _ASM_GENERIC_IRQ_REGS_H
  8. #define _ASM_GENERIC_IRQ_REGS_H
  9. #include <linux/percpu.h>
  10. /*
  11. * Per-cpu current frame pointer - the location of the last exception frame on
  12. * the stack
  13. */
  14. DECLARE_PER_CPU(struct pt_regs *, __irq_regs);
  15. static inline struct pt_regs *get_irq_regs(void)
  16. {
  17. return __this_cpu_read(__irq_regs);
  18. }
  19. static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
  20. {
  21. struct pt_regs *old_regs;
  22. old_regs = __this_cpu_read(__irq_regs);
  23. __this_cpu_write(__irq_regs, new_regs);
  24. return old_regs;
  25. }
  26. #endif /* _ASM_GENERIC_IRQ_REGS_H */