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Instead of setting child_reaper and SIGNAL_UNKILLABLE one way for the system init process, and another way for pid namespace init processes test pid->nr == 1 and use the same code for both. For the global init this results in SIGNAL_UNKILLABLE being set much earlier in the initialization process. This is a small cleanup and it paves the way for allowing unshare and enter of the pid namespace as that path like our global init also will not set CLONE_NEWPID. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>