extern int brcmf_proto_cdc_query_dcmd(struct brcmf_pub *drvr, int ifidx,
                                       uint cmd, void *buf, uint len);
 
-/* OS independent layer functions */
-extern int brcmf_os_proto_block(struct brcmf_pub *drvr);
-extern int brcmf_os_proto_unblock(struct brcmf_pub *drvr);
 #ifdef BCMDBG
 extern int brcmf_write_to_file(struct brcmf_pub *drvr, const u8 *buf, int size);
 #endif                         /* BCMDBG */
 
                brcmf_dbg(ERROR, "bus is down. we have nothing to do.\n");
                return ret;
        }
-       brcmf_os_proto_block(drvr);
+       mutex_lock(&drvr->proto_block);
 
        brcmf_dbg(TRACE, "Enter\n");
 
        prot->pending = false;
 
 done:
-       brcmf_os_proto_unblock(drvr);
+       mutex_unlock(&drvr->proto_block);
 
        return ret;
 }
 
        brcmf_dbg(TRACE, "Enter\n");
 
-       brcmf_os_proto_block(drvr);
+       mutex_lock(&drvr->proto_block);
 
        /* Get the device MAC address */
        strcpy(buf, "cur_etheraddr");
        ret = brcmf_proto_cdc_query_dcmd(drvr, 0, BRCMF_C_GET_VAR,
                                          buf, sizeof(buf));
        if (ret < 0) {
-               brcmf_os_proto_unblock(drvr);
+               mutex_unlock(&drvr->proto_block);
                return ret;
        }
        memcpy(drvr->mac, buf, ETH_ALEN);
 
-       brcmf_os_proto_unblock(drvr);
+       mutex_unlock(&drvr->proto_block);
 
        ret = brcmf_c_preinit_dcmds(drvr);
 
 
        int scan_unassoc_time = 40;
        int i;
 
-       brcmf_os_proto_block(drvr);
+       mutex_lock(&drvr->proto_block);
 
        /* Set Country code */
        if (drvr->country_code[0] != 0) {
                                                 0, true);
        }
 
-       brcmf_os_proto_unblock(drvr);
+       mutex_unlock(&drvr->proto_block);
 
        return 0;
 }
 
        }
 }
 
-int brcmf_os_proto_block(struct brcmf_pub *drvr)
-{
-       if (drvr) {
-               mutex_lock(&drvr->proto_block);
-               return 1;
-       }
-       return 0;
-}
-
-int brcmf_os_proto_unblock(struct brcmf_pub *drvr)
-{
-       if (drvr) {
-               mutex_unlock(&drvr->proto_block);
-               return 1;
-       }
-
-       return 0;
-}
-
 static int brcmf_get_pend_8021x_cnt(struct brcmf_pub *drvr)
 {
        return atomic_read(&drvr->pend_8021x_cnt);