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[PATCH] m68k: introduce task_thread_info

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new helper - task_thread_info(task).  On platforms that have thread_info
allocated separately (i.e.  in default case) it simply returns
task->thread_info.  m68k wants (and for good reasons) to embed its thread_info
into task_struct.  So it will (in later patch) have task_thread_info() of its
own.  For now we just add a macro for generic case and convert existing
instances of its body in core kernel to uses of new macro.  Obviously safe -
all normal architectures get the same preprocessor output they used to get.

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 16:06:55 -08:00 committed by Linus Torvalds
parent 7feacd5334
commit a1261f5461
4 changed files with 15 additions and 13 deletions
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16
include/linux/sched.h
View file

@ -1233,32 +1233,34 @@ static inline void task_unlock(struct task_struct *p)
spin_unlock(&p->alloc_lock);
}
#define task_thread_info(task) (task)->thread_info
/* set thread flags in other task's structures
* - see asm/thread_info.h for TIF_xxxx flags available
*/
static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
{
set_ti_thread_flag(tsk->thread_info,flag);
set_ti_thread_flag(task_thread_info(tsk), flag);
}
static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
{
clear_ti_thread_flag(tsk->thread_info,flag);
clear_ti_thread_flag(task_thread_info(tsk), flag);
}
static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
{
return test_and_set_ti_thread_flag(tsk->thread_info,flag);
return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
}
static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)
{
return test_and_clear_ti_thread_flag(tsk->thread_info,flag);
return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);
}
static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)
{
return test_ti_thread_flag(tsk->thread_info,flag);
return test_ti_thread_flag(task_thread_info(tsk), flag);
}
static inline void set_tsk_need_resched(struct task_struct *tsk)
@ -1329,12 +1331,12 @@ extern void signal_wake_up(struct task_struct *t, int resume_stopped);
static inline unsigned int task_cpu(const struct task_struct *p)
{
return p->thread_info->cpu;
return task_thread_info(p)->cpu;
}
static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
{
p->thread_info->cpu = cpu;
task_thread_info(p)->cpu = cpu;
}
#else

2
kernel/exit.c
View file

@ -859,7 +859,7 @@ fastcall NORET_TYPE void do_exit(long code)
if (group_dead && tsk->signal->leader)
disassociate_ctty(1);
module_put(tsk->thread_info->exec_domain->module);
module_put(task_thread_info(tsk)->exec_domain->module);
if (tsk->binfmt)
module_put(tsk->binfmt->module);

4
kernel/fork.c
View file

@ -919,7 +919,7 @@ static task_t *copy_process(unsigned long clone_flags,
if (nr_threads >= max_threads)
goto bad_fork_cleanup_count;
if (!try_module_get(p->thread_info->exec_domain->module))
if (!try_module_get(task_thread_info(p)->exec_domain->module))
goto bad_fork_cleanup_count;
if (p->binfmt && !try_module_get(p->binfmt->module))
@ -1180,7 +1180,7 @@ static task_t *copy_process(unsigned long clone_flags,
if (p->binfmt)
module_put(p->binfmt->module);
bad_fork_cleanup_put_domain:
module_put(p->thread_info->exec_domain->module);
module_put(task_thread_info(p)->exec_domain->module);
bad_fork_cleanup_count:
put_group_info(p->group_info);
atomic_dec(&p->user->processes);

6
kernel/sched.c
View file

@ -1437,7 +1437,7 @@ void fastcall sched_fork(task_t *p, int clone_flags)
#endif
#ifdef CONFIG_PREEMPT
/* Want to start with kernel preemption disabled. */
p->thread_info->preempt_count = 1;
task_thread_info(p)->preempt_count = 1;
#endif
/*
* Share the timeslice between parent and child, thus the
@ -4410,9 +4410,9 @@ void __devinit init_idle(task_t *idle, int cpu)
/* Set the preempt count _outside_ the spinlocks! */
#if defined(CONFIG_PREEMPT) && !defined(CONFIG_PREEMPT_BKL)
idle->thread_info->preempt_count = (idle->lock_depth >= 0);
task_thread_info(idle)->preempt_count = (idle->lock_depth >= 0);
#else
idle->thread_info->preempt_count = 0;
task_thread_info(idle)->preempt_count = 0;
#endif
}