Macros starting with `l' in kern

• LBHASH kern/mach_net.c:291
• LOCK_BUCKET kern/mach_net.c:310
• lock_read_done kern/lock.h:161
• lock_write_done kern/lock.h:162
• lock_zone kern/zalloc.c:140
• lock_zone_init kern/zalloc.c:162