ipcsem-open-code-and-rename-sem_lock-fix

ipcsem-open-code-and-rename-sem_lock-fix

propagate the ipc_obtain_object() errno out of sem_obtain_lock()

Cc: Chegu Vinod <chegu_vinod@hp.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Emmanuel Benisty <benisty.e@gmail.com>
Cc: Jason Low <jason.low2@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michel Lespinasse <walken@google.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>