| David Gibson | 584224e | 2005-11-09 13:04:06 +1100 | [diff] [blame] | 1 | #ifndef _ASM_POWERPC_CURRENT_H |
| 2 | #define _ASM_POWERPC_CURRENT_H |
| Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 3 | #ifdef __KERNEL__ |
| David Gibson | 584224e | 2005-11-09 13:04:06 +1100 | [diff] [blame] | 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__ |
| Olaf Hering | dbc11f5 | 2007-02-25 20:04:18 +0100 | [diff] [blame] | 15 | #include <linux/stddef.h> |
| David Gibson | 584224e | 2005-11-09 13:04:06 +1100 | [diff] [blame] | 16 | #include <asm/paca.h> |
| 17 | |
| Hugh Dickins | 5fe8e8b | 2006-10-31 18:39:31 +0000 | [diff] [blame] | 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() |
| David Gibson | 584224e | 2005-11-09 13:04:06 +1100 | [diff] [blame] | 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 | |
| Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 39 | #endif /* __KERNEL__ */ |
| David Gibson | 584224e | 2005-11-09 13:04:06 +1100 | [diff] [blame] | 40 | #endif /* _ASM_POWERPC_CURRENT_H */ |