How span is populated

The function that configures a span is

static void init_spans(struct tor2 *tor)
{
 int x, y, c;
 for (x = 0; x <>spans[x].name, "Tor2/%d/%d", tor->num, x + 1);
     snprintf(tor->spans[x].desc, sizeof(tor->spans[x].desc) - 1,
          "Tormenta 2 (PCI) fQuad %s Card %d Span %d",
          (tor->cardtype == TYPE_T1)  ?  "T1"  :  "E1", tor->num, x + 1);
     tor->spans[x].manufacturer = "Digium";
     strncpy(tor->spans[x].devicetype, tor->type, sizeof(tor->spans[x].devicetype) - 1);
     snprintf(tor->spans[x].location, sizeof(tor->spans[x].location) - 1,
          "PCI Bus %02d Slot %02d", tor->pci->bus->number, PCI_SLOT(tor->pci->devfn) + 1);
     tor->spans[x].spanconfig = tor2_spanconfig;
     tor->spans[x].chanconfig = tor2_chanconfig;
     tor->spans[x].startup = tor2_startup;
     tor->spans[x].shutdown = tor2_shutdown;
     tor->spans[x].rbsbits = tor2_rbsbits;
     tor->spans[x].maint = tor2_maint;
     tor->spans[x].open = tor2_open;
     tor->spans[x].close  = tor2_close;
     if (tor->cardtype == TYPE_T1) {
         tor->spans[x].channels = 24;
         tor->spans[x].deflaw = ZT_LAW_MULAW;
         tor->spans[x].linecompat = ZT_CONFIG_AMI | ZT_CONFIG_B8ZS | ZT_CONFIG_D4 | ZT_CONFIG_ESF;
         tor->spans[x].spantype = "T1";
     } else {
         tor->spans[x].channels = 31;
         tor->spans[x].deflaw = ZT_LAW_ALAW;
         tor->spans[x].linecompat = ZT_CONFIG_HDB3 | ZT_CONFIG_CCS | ZT_CONFIG_CRC4;
         tor->spans[x].spantype = "E1";
     }
     tor->spans[x].chans = tor->chans[x];
     tor->spans[x].flags = ZT_FLAG_RBS;
     tor->spans[x].ioctl = tor2_ioctl;
     tor->spans[x].pvt = &tor->tspans[x];
     tor->tspans[x].tor = tor;
     tor->tspans[x].span = x;
     init_waitqueue_head(&tor->spans[x].maintq);
     for (y=0;yspans[x].channels;y++) {
         struct zt_chan *mychans = tor->chans[x] + y;
         sprintf(mychans->name, "Tor2/%d/%d/%d", tor->num, x + 1, y + 1);
         mychans->sigcap = ZT_SIG_EM | ZT_SIG_CLEAR | ZT_SIG_FXSLS | ZT_SIG_FXSGS | ZT_SIG_FXSKS |
                                   ZT_SIG_FXOLS | ZT_SIG_FXOGS | ZT_SIG_FXOKS | ZT_SIG_CAS | ZT_SIG_SF | ZT_SIG_EM_E1;
         c = (x * tor->spans[x].channels) + y;
         mychans->pvt = &tor->tchans[c];
         mychans->chanpos = y + 1;
         tor->tchans[c].span = x;
         tor->tchans[c].tor = tor;
     }
 }
}


These are the function assignments:
     tor->spans[x].spanconfig = tor2_spanconfig;
     tor->spans[x].chanconfig = tor2_chanconfig;
     tor->spans[x].startup = tor2_startup;
     tor->spans[x].shutdown = tor2_shutdown;
     tor->spans[x].rbsbits = tor2_rbsbits;
     tor->spans[x].maint = tor2_maint;
     tor->spans[x].open = tor2_open;
     tor->spans[x].close  = tor2_close;
     tor->spans[x].ioctl = tor2_ioctl;

The variable initialization
 <snip what="name initialization">

 tor->spans[x].channels = 24;
 tor->spans[x].deflaw = ZT_LAW_MULAW;
 tor->spans[x].linecompat = ZT_CONFIG_AMI | ZT_CONFIG_B8ZS | ZT_CONFIG_D4 | ZT_CONFIG_ESF;
 tor->spans[x].spantype = "T1";
Or
 tor->spans[x].channels = 31;
 tor->spans[x].deflaw = ZT_LAW_ALAW;
 tor->spans[x].linecompat = ZT_CONFIG_HDB3 | ZT_CONFIG_CCS | ZT_CONFIG_CRC4;
 tor->spans[x].spantype = "E1";

 tor->spans[x].chans = tor->chans[x];
 tor->spans[x].flags = ZT_FLAG_RBS;
 tor->spans[x].pvt = &tor->tspans[x];