6664275 robust locks are not so robust after all

[roger.faulk...@sun.com]

Author: raf
Repository: /hg/onnv/onnv-gate
Latest revision: 275ef202181908a14eb16e4db8edd6ad43457651
Total changesets: 1
Log message:
6664275 robust locks are not so robust after all

Files:
        update: usr/src/common/atomic/atomic.c
        update: usr/src/lib/libc/inc/thr_uberdata.h
        update: usr/src/lib/libc/port/threads/synch.c
        update: usr/src/uts/common/syscall/lwp_sobj.c
        update: usr/src/uts/intel/sys/synch32.h
        update: usr/src/uts/sparc/sys/synch32.h