LXR linux/arch/csky/include/asm/switch

   1/* SPDX-License-Identifier: GPL-2.0 */
   2
   3#ifndef __ASM_CSKY_SWITCH_TO_H
   4#define __ASM_CSKY_SWITCH_TO_H
   5
   6#include <linux/thread_info.h>
   7#ifdef CONFIG_CPU_HAS_FPU
   8#include <abi/fpu.h>
   9static inline void __switch_to_fpu(struct task_struct *prev,
  10                                   struct task_struct *next)
  11{
  12        save_to_user_fp(&prev->thread.user_fp);
  13        restore_from_user_fp(&next->thread.user_fp);
  14}
  15#else
  16static inline void __switch_to_fpu(struct task_struct *prev,
  17                                   struct task_struct *next)
  18{}
  19#endif
  20
  21/*
  22 * Context switching is now performed out-of-line in switch_to.S
  23 */
  24extern struct task_struct *__switch_to(struct task_struct *,
  25                                       struct task_struct *);
  26
  27#define switch_to(prev, next, last)                                     \
  28        do {                                                            \
  29                struct task_struct *__prev = (prev);                    \
  30                struct task_struct *__next = (next);                    \
  31                __switch_to_fpu(__prev, __next);                        \
  32                ((last) = __switch_to((prev), (next)));                 \
  33        } while (0)
  34
  35#endif /* __ASM_CSKY_SWITCH_TO_H */
  36