Macros starting with `u' in osfmk/i386

• UNLOCK_PVH osfmk/i386/pmap.c:360
• unlock_pvh_pai osfmk/i386/pmap.c:243
• UNLOCK_RTC osfmk/i386/rtclock.c:152
• user_pc osfmk/i386/thread_act.h:156
• USER_REGS osfmk/i386/thread_act.h:147
• user_sp osfmk/i386/thread_act.h:157