kernel/arch/xtensa/include/asm/switch_to.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2001 - 2005 Tensilica Inc.
   7  */
   8
   9 #ifndef _XTENSA_SWITCH_TO_H
  10 #define _XTENSA_SWITCH_TO_H
  11
  12 /* * switch_to(n) should switch tasks to task nr n, first
  13  * checking that n isn't the current task, in which case it does nothing.
  14  */
  15 extern void *_switch_to(void *last, void *next);
  16
  17 #define switch_to(prev,next,last)               \
  18 do {                                            \
  19         (last) = _switch_to(prev, next);        \
  20 } while(0)
  21
  22 #endif /* _XTENSA_SWITCH_TO_H */