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[PATCH] m68k: introduce setup_thread_stack() and end_of_stack()

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encapsulates the rest of arch-dependent operations with thread_info access.
Two new helpers - setup_thread_stack() and end_of_stack().  For normal case
the former consists of copying thread_info of parent to new thread_info and
the latter returns pointer immediately past the end of thread_info.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Al Viro
2005-11-13 16:06:56 -08:00
committed by Linus Torvalds
parent a1261f5461
commit 10ebffde3d
3 changed files with 14 additions and 4 deletions
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11
include/linux/sched.h
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@@ -1235,6 +1235,17 @@ static inline void task_unlock(struct task_struct *p)
#define task_thread_info(task) (task)->thread_info
static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
{
*task_thread_info(p) = *task_thread_info(org);
task_thread_info(p)->task = p;
}
static inline unsigned long *end_of_stack(struct task_struct *p)
{
return (unsigned long *)(p->thread_info + 1);
}
/* set thread flags in other task's structures
* - see asm/thread_info.h for TIF_xxxx flags available
*/