Bartek Rutkowski cee09850f7 Make sysctl_kern_proc_umask execute fast path when requested pid in
curproc->p_pid or 0, avoiding unnecessary locking. Update libc consumer
to skip calling getpid().

Submitted by:	Pawel Biernacki <pawel.biernacki@gmail.com>
Reviewed by:	mjg, robak
Approved by:	mjg
Sponsored by:	Mysterious Code Ltd.
Differential Revision:	D12972
2017-11-07 15:13:32 +00:00
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