From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Brauner Subject: [PATCH v3 4/5] exit: use pid_has_task() in do_wait() Date: Thu, 17 Oct 2019 12:18:31 +0200 Message-ID: <20191017101832.5985-4-christian.brauner@ubuntu.com> References: <20191016153606.2326-1-christian.brauner@ubuntu.com> <20191017101832.5985-1-christian.brauner@ubuntu.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20191017101832.5985-1-christian.brauner@ubuntu.com> Sender: linux-kernel-owner@vger.kernel.org To: oleg@redhat.com, linux-kernel@vger.kernel.org Cc: aarcange@redhat.com, akpm@linux-foundation.org, christian@kellner.me, cyphar@cyphar.com, elena.reshetova@intel.com, guro@fb.com, jannh@google.com, ldv@altlinux.org, linux-api@vger.kernel.org, linux-kselftest@vger.kernel.org, mhocko@suse.com, mingo@kernel.org, peterz@infradead.org, shuah@kernel.org, tglx@linutronix.de, viro@zeniv.linux.org.uk, Christian Brauner List-Id: linux-api@vger.kernel.org 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 Reviewed-by: Oleg Nesterov --- /* 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 : - 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); -- 2.23.0