AcoSail/kernel_optimize_test
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[PATCH] session_of_pgrp: kill unnecessary do_each_task_pid(PIDTYPE_PGID)

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All members of the process group have the same sid and it can't be == 0.

NOTE: this code (and a similar one in sys_setpgid) was needed because it
was possibe to have ->session == 0. It's not possible any longer since

	[PATCH] pidhash: don't use zero pids
	Commit: c7c6464117

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Oleg Nesterov 2006-12-08 02:38:03 -08:00 committed by Linus Torvalds
parent f020bc468f
commit 62dfb5541a
1 changed files with 8 additions and 11 deletions
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19
kernel/exit.c
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@ -189,21 +189,18 @@ void release_task(struct task_struct * p)
int session_of_pgrp(int pgrp)
{
struct task_struct *p;
int sid = -1;
int sid = 0;
read_lock(&tasklist_lock);
do_each_task_pid(pgrp, PIDTYPE_PGID, p) {
if (process_session(p) > 0) {
sid = process_session(p);
goto out;
}
} while_each_task_pid(pgrp, PIDTYPE_PGID, p);
p = find_task_by_pid(pgrp);
if (p)
p = find_task_by_pid_type(PIDTYPE_PGID, pgrp);
if (p == NULL)
p = find_task_by_pid(pgrp);
if (p != NULL)
sid = process_session(p);
out:
read_unlock(&tasklist_lock);
return sid;
}