Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
current.h
Go to the documentation of this file.
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 */