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Diffstat (limited to 'kernel/arch/mn10300/include/asm/current.h')
| -rw-r--r-- | kernel/arch/mn10300/include/asm/current.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/arch/mn10300/include/asm/current.h b/kernel/arch/mn10300/include/asm/current.h new file mode 100644 index 000000000..ca6027d83 --- /dev/null +++ b/kernel/arch/mn10300/include/asm/current.h @@ -0,0 +1,37 @@ +/* MN10300 Current task structure accessor + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef _ASM_CURRENT_H +#define _ASM_CURRENT_H + +#include <linux/thread_info.h> + +/* + * dedicate E2 to keeping the current task pointer + */ +#ifdef CONFIG_MN10300_CURRENT_IN_E2 + +register struct task_struct *const current asm("e2") __attribute__((used)); + +#define get_current() current + +extern struct task_struct *__current; + +#else +static inline __attribute__((const)) +struct task_struct *get_current(void) +{ + return current_thread_info()->task; +} + +#define current get_current() +#endif + +#endif /* _ASM_CURRENT_H */ |