[v3,4/5] exit: use pid_has_task() in do_wait()
diff mbox series

Message ID 20191017101832.5985-4-christian.brauner@ubuntu.com
State New
Headers show
Series
  • [v3,1/5] pidfd: check pid has attached task in fdinfo
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Commit Message

Christian Brauner Oct. 17, 2019, 10:18 a.m. UTC
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(-)

Patch
diff mbox series

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);