proc: delete redundant subset=pid check
Two checks in lookup and readdir code should be enough to not have third check in open code. Can't open what can't be looked up? Link: https://lkml.kernel.org/r/YFYYwIBIkytqnkxP@localhost.localdomainSigned-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Alexey Gladkov <gladkov.alexey@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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