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b920de1b DH |
1 | /* MN10300 Current task structure accessor |
2 | * | |
3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | #ifndef _ASM_CURRENT_H | |
12 | #define _ASM_CURRENT_H | |
13 | ||
14 | #include <linux/thread_info.h> | |
15 | ||
16 | /* | |
17 | * dedicate E2 to keeping the current task pointer | |
18 | */ | |
19 | #ifdef CONFIG_MN10300_CURRENT_IN_E2 | |
20 | ||
21 | register struct task_struct *const current asm("e2") __attribute__((used)); | |
22 | ||
23 | #define get_current() current | |
24 | ||
25 | extern struct task_struct *__current; | |
26 | ||
27 | #else | |
28 | static inline __attribute__((const)) | |
29 | struct task_struct *get_current(void) | |
30 | { | |
31 | return current_thread_info()->task; | |
32 | } | |
33 | ||
34 | #define current get_current() | |
35 | #endif | |
36 | ||
37 | #endif /* _ASM_CURRENT_H */ |