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Linux/arch/powerpc/include/asm/current.h

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  1 #ifndef _ASM_POWERPC_CURRENT_H
  2 #define _ASM_POWERPC_CURRENT_H
  3 #ifdef __KERNEL__
  4 
  5 /*
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License
  8  * as published by the Free Software Foundation; either version
  9  * 2 of the License, or (at your option) any later version.
 10  */
 11 
 12 struct task_struct;
 13 
 14 #ifdef __powerpc64__
 15 #include <linux/stddef.h>
 16 #include <asm/paca.h>
 17 
 18 static inline struct task_struct *get_current(void)
 19 {
 20         struct task_struct *task;
 21 
 22         __asm__ __volatile__("ld %0,%1(13)"
 23         : "=r" (task)
 24         : "i" (offsetof(struct paca_struct, __current)));
 25 
 26         return task;
 27 }
 28 #define current get_current()
 29 
 30 #else
 31 
 32 /*
 33  * We keep `current' in r2 for speed.
 34  */
 35 register struct task_struct *current asm ("r2");
 36 
 37 #endif
 38 
 39 #endif /* __KERNEL__ */
 40 #endif /* _ASM_POWERPC_CURRENT_H */
 41 

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