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Fold it into pidfd_prepare() and rename PIDFD_CLONE to PIDFD_STALE to indicate that the passed pid might not have task linkage and no explicit check for that should be performed. Link: https://lore.kernel.org/20250425-work-pidfs-net-v2-3-450a19461e75@kernel.org Reviewed-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: David Rheinsberg <david@readahead.eu> Signed-off-by: Christian Brauner <brauner@kernel.org>