arch/c6x/include/asm/switch_to.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  Port on Texas Instruments TMS320C6x architecture
   4  *
   5  *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
   6  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
   7  */
   8 #ifndef _ASM_C6X_SWITCH_TO_H
   9 #define _ASM_C6X_SWITCH_TO_H
  10
  11 #include <linux/linkage.h>
  12
  13 #define prepare_to_switch()    do { } while (0)
  14
  15 struct task_struct;
  16 struct thread_struct;
  17 asmlinkage void *__switch_to(struct thread_struct *prev,
  18                              struct thread_struct *next,
  19                              struct task_struct *tsk);
  20
  21 #define switch_to(prev, next, last)                             \
  22         do {                                                    \
  23                 current->thread.wchan = (u_long) __builtin_return_address(0); \
  24                 (last) = __switch_to(&(prev)->thread,           \
  25                                      &(next)->thread, (prev));  \
  26                 mb();                                           \
  27                 current->thread.wchan = 0;                      \
  28         } while (0)
  29
  30 #endif /* _ASM_C6X_SWITCH_TO_H */