pid: use pid_has_task() in pidfd_open()
authorChristian Brauner <christian.brauner@ubuntu.com>
Thu, 17 Oct 2019 10:18:32 +0000 (12:18 +0200)
committerChristian Brauner <christian.brauner@ubuntu.com>
Thu, 17 Oct 2019 13:37:00 +0000 (15:37 +0200)
commit1e1d0f0b1a3e3533ea4cd4021eb251e53827c70b
tree9541039708759d3cddf4a724090d3f3f54ab442d
parent1722c14a2097634a7ba37000c0ec7d9409918b64
pid: use pid_has_task() in pidfd_open()

Use the new pid_has_task() helper in pidfd_open(). This simplifies the
code and avoids taking rcu_read_{lock,unlock}() and leads to overall
nicer code.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20191017101832.5985-5-christian.brauner@ubuntu.com
kernel/pid.c