swapdrum_getsdp
sdp = swapdrum_getsdp(pageno);
sdp = swapdrum_getsdp(startslot);
sdp = swapdrum_getsdp(startslot);
sdp = swapdrum_getsdp(startslot);
static struct swapdev *swapdrum_getsdp(int);
sdp = swapdrum_getsdp(startslot);
result = swapdrum_getsdp(pgno) == sdp;