SG_ENT_PHYS_ADDRESS
next_paddr = SG_ENT_PHYS_ADDRESS(leader) + leader_length;
addr = SG_ENT_PHYS_ADDRESS(sg);
unsigned long paddr = SG_ENT_PHYS_ADDRESS(leader);
paddr = SG_ENT_PHYS_ADDRESS(sg);
paddr = (unsigned long) SG_ENT_PHYS_ADDRESS(s);
unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);
paddr = (unsigned long) SG_ENT_PHYS_ADDRESS(s);