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Date: Tue, 28 Aug 2007 14:18:35 +0400 From: Oleg Nesterov <oleg@...sign.ru> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Roland McGrath <roland@...hat.com>, linux-kernel@...r.kernel.org Subject: [PATCH] wait_task_stopped/continued: remove unneeded p->signal != NULL check The child was found on ->children list under tasklist_lock, it must have a valid ->signal. __exit_signal() both removes the task from parent->children and clears ->signal "atomically" under write_lock(tasklist). Remove unneeded checks. Signed-off-by: Oleg Nesterov <oleg@...sign.ru> --- t/kernel/exit.c~ 2007-08-28 14:07:53.000000000 +0400 +++ t/kernel/exit.c 2007-08-28 14:09:14.000000000 +0400 @@ -1348,7 +1348,7 @@ static int wait_task_stopped(struct task if (!p->exit_code) return 0; if (delayed_group_leader && !(p->ptrace & PT_PTRACED) && - p->signal && p->signal->group_stop_count > 0) + p->signal->group_stop_count > 0) /* * A group stop is in progress and this is the group leader. * We won't report until all threads have stopped. @@ -1462,9 +1462,6 @@ static int wait_task_continued(struct ta pid_t pid; uid_t uid; - if (unlikely(!p->signal)) - return 0; - if (!(p->signal->flags & SIGNAL_STOP_CONTINUED)) return 0; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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