Replace hlist_empty() with the new pid_has_task() helper which is more idiomatic, easier to grep for, and unifies how callers perform this check.
Signed-off-by: Christian Brauner christian.brauner@ubuntu.com Reviewed-by: Oleg Nesterov oleg@redhat.com --- /* pidfd selftests */ passed
/* v1 */ patch not present
/* v2 */ Link: https://lore.kernel.org/r/20191016153606.2326-4-christian.brauner@ubuntu.com patch introduced
/* v3 */ - Oleg Nesterov oleg@redhat.com: - s/task_alive/pid_has_task/ --- kernel/exit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/exit.c b/kernel/exit.c index a46a50d67002..f2d20ab74422 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1457,7 +1457,7 @@ static long do_wait(struct wait_opts *wo) */ wo->notask_error = -ECHILD; if ((wo->wo_type < PIDTYPE_MAX) && - (!wo->wo_pid || hlist_empty(&wo->wo_pid->tasks[wo->wo_type]))) + (!wo->wo_pid || !pid_has_task(wo->wo_pid, wo->wo_type))) goto notask;
set_current_state(TASK_INTERRUPTIBLE);