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include/linux/sched.h: don't use task->pid/tgid in same_thread_group/has_group_leader_pid

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task_struct->pid/tgid should go away.

1. Change same_thread_group() to use task->signal for comparison.

2. Change has_group_leader_pid(task) to compare task_pid(task) with
   signal->leader_pid.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Sergey Dyasly <dserrg@gmail.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2013-09-11 14:20:06 -07:00 committed by Linus Torvalds
parent 28e8be3180
commit e1403b8edf
1 changed files with 4 additions and 4 deletions
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8
include/linux/sched.h
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@ -2169,15 +2169,15 @@ static inline bool thread_group_leader(struct task_struct *p)
* all we care about is that we have a task with the appropriate * all we care about is that we have a task with the appropriate
* pid, we don't actually care if we have the right task. * pid, we don't actually care if we have the right task.
*/ */
static inline int has_group_leader_pid(struct task_struct *p) static inline bool has_group_leader_pid(struct task_struct *p)
{ {
return p->pid == p->tgid; return task_pid(p) == p->signal->leader_pid;
} }
static inline static inline
int same_thread_group(struct task_struct *p1, struct task_struct *p2) bool same_thread_group(struct task_struct *p1, struct task_struct *p2)
{ {
return p1->tgid == p2->tgid; return p1->signal == p2->signal;
} }
static inline struct task_struct *next_thread(const struct task_struct *p) static inline struct task_struct *next_thread(const struct task_struct *p)