Merge tag 'vfs-6.18-rc1.pidfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull pidfs updates from Christian Brauner:
 "This just contains a few changes to pid_nr_ns() to make it more robust
  and cleans up or improves a few users that ab- or misuse it currently"

* tag 'vfs-6.18-rc1.pidfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  pid: change task_state() to use task_ppid_nr_ns()
  pid: change bacct_add_tsk() to use task_ppid_nr_ns()
  pid: make __task_pid_nr_ns(ns => NULL) safe for zombie callers
  pid: Add a judgment for ns null in pid_nr_ns