rctlblk_get_global_flags
global_flags = rctlblk_get_global_flags(iter_val->rblk);
arg_global_flags = rctlblk_get_global_flags(rctlblkA);
uint_t flags = rctlblk_get_global_flags(gblk);
uint_t rctlblk_get_global_flags(rctlblk_t *);
if (rctlblk_get_global_flags(blk) & RCTL_GLOBAL_DENY_ALWAYS)
global_flags = rctlblk_get_global_flags(current);