| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | #ifndef _ASM_POWERPC_CURRENT_H |
| 3 | #define _ASM_POWERPC_CURRENT_H |
| 4 | #ifdef __KERNEL__ |
| 5 | |
| 6 | /* |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | struct task_struct; |
| 10 | |
| 11 | #ifdef __powerpc64__ |
| 12 | #include <linux/stddef.h> |
| 13 | #include <asm/paca.h> |
| 14 | |
| 15 | static inline struct task_struct *get_current(void) |
| 16 | { |
| 17 | struct task_struct *task; |
| 18 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 19 | /* get_current can be cached by the compiler, so no volatile */ |
| 20 | asm ("ld %0,%1(13)" |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 21 | : "=r" (task) |
| 22 | : "i" (offsetof(struct paca_struct, __current))); |
| 23 | |
| 24 | return task; |
| 25 | } |
| 26 | #define current get_current() |
| 27 | |
| 28 | #else |
| 29 | |
| 30 | /* |
| 31 | * We keep `current' in r2 for speed. |
| 32 | */ |
| 33 | register struct task_struct *current asm ("r2"); |
| 34 | |
| 35 | #endif |
| 36 | |
| 37 | #endif /* __KERNEL__ */ |
| 38 | #endif /* _ASM_POWERPC_CURRENT_H */ |