signal: do_signal_stop: Remove the unneeded task_clear_group_stop_pending()
authorOleg Nesterov <oleg@redhat.com>
Fri, 1 Apr 2011 18:12:16 +0000 (20:12 +0200)
committerTejun Heo <tj@kernel.org>
Mon, 4 Apr 2011 00:11:04 +0000 (02:11 +0200)
commit780006eac2fe7f4d2582da16a096e5a44c4767ff
tree13d315029abead58b8b88071c7177271824b211a
parent1deac632fc3dcff33a6df3e82ef10c738ac13fe6
signal: do_signal_stop: Remove the unneeded task_clear_group_stop_pending()

PF_EXITING or TASK_STOPPED has already called task_participate_group_stop()
and cleared its ->group_stop. No need to do task_clear_group_stop_pending()
when we start the new group stop.

Add a small comment to explain the !task_is_stopped() check. Note that this
check is not exactly right and it can lead to unnecessary stop later if the
thread is TASK_PTRACED. What we need is task_participated_in_group_stop(),
this will be solved later.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
kernel/signal.c