{
 #ifdef __LP64__
        int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
        convert_to_wide(pdc_result);
        if(pdc_result[0] != NARROW_FIRMWARE)
                parisc_narrow_firmware = 0;
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 #endif
 }
 
 int pdc_add_valid(unsigned long address)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
         memcpy(&pdc_result2, led_info, len);
         retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
                               __pa(pdc_result), __pa(pdc_result2), len);
         memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
         memcpy(led_info, pdc_result2, len);
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
 {
        int retval = 0;
+       unsigned long flags;
         
        if (!is_pdc_pat())
                return -1;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_chassis_disp(unsigned long disp)
 {
        int retval = 0;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_chassis_warn(unsigned long *warn)
 {
        int retval = 0;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
        *warn = pdc_result[0];
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int __init pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
         convert_to_wide(pdc_result);
         pdc_coproc_info->ccr_functional = pdc_result[0];
         pdc_coproc_info->ccr_present = pdc_result[1];
         pdc_coproc_info->revision = pdc_result[17];
         pdc_coproc_info->model = pdc_result[18];
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
                  void *iodc_data, unsigned int iodc_data_size)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, 
                              index, __pa(pdc_result2), iodc_data_size);
        convert_to_wide(pdc_result);
        *actcnt = pdc_result[0];
        memcpy(iodc_data, pdc_result2, iodc_data_size);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
                             struct pdc_module_path *mod_path, long mod_index)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), 
                              __pa(pdc_result2), mod_index);
        convert_to_wide(pdc_result);
        memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
        memcpy(mod_path, pdc_result2, sizeof(*mod_path));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
        return retval;
                              long mod_index, long addr_index)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
                              mod_index, addr_index);
        convert_to_wide(pdc_result);
        memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
        return retval;
 int pdc_model_info(struct pdc_model *model) 
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
        convert_to_wide(pdc_result);
        memcpy(model, pdc_result, sizeof(*model));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_model_sysmodel(char *name)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
                               OS_ID_HPUX, __pa(name));
         convert_to_wide(pdc_result);
         } else {
                 name[0] = 0;
         }
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_model_versions(unsigned long *versions, int id)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
         convert_to_wide(pdc_result);
         *versions = pdc_result[0];
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_model_cpuid(unsigned long *cpu_id)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
         retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
         convert_to_wide(pdc_result);
         *cpu_id = pdc_result[0];
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_model_capabilities(unsigned long *capabilities)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
         retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
         convert_to_wide(pdc_result);
         *capabilities = pdc_result[0];
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_cache_info(struct pdc_cache_info *cache_info)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
         convert_to_wide(pdc_result);
         memcpy(cache_info, pdc_result, sizeof(*cache_info));
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_spaceid_bits(unsigned long *space_bits)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        pdc_result[0] = 0;
        retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
        convert_to_wide(pdc_result);
        *space_bits = pdc_result[0];
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_btlb_info(struct pdc_btlb_info *btlb) 
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
         memcpy(btlb, pdc_result, sizeof(*btlb));
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         if(retval < 0) {
                 btlb->max_size = 0;
                struct pdc_module_path *mod_path)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         memcpy(pdc_result2, mod_path, sizeof(*mod_path));
         retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
                                __pa(pdc_result2));
         memcpy(address, pdc_result, sizeof(*address));
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
                        __pa(pdc_result), hpa);
        if (retval < 0) {
        } else {
                memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
        }
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
                __pa(pdc_result), count);
        convert_to_wide(pdc_result);
        memcpy(memaddr, pdc_result, count);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        memcpy(pdc_result, memaddr, count);
        convert_to_wide(pdc_result);
        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
                __pa(pdc_result), count);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_stable_get_size(unsigned long *size)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
        *size = pdc_result[0];
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_stable_verify_contents(void)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_stable_initialize(void)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
 
 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
        }
 
  out:
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
        return (retval >= PDC_OK);
 }
 EXPORT_SYMBOL(pdc_get_initiator);
 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, 
                              __pa(pdc_result), hpa);
        convert_to_wide(pdc_result);
        *num_entries = pdc_result[0];
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
 {
        int retval;
+       unsigned long flags;
 
        BUG_ON((unsigned long)tbl & 0x7);
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        pdc_result[0] = num_entries;
        retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, 
                              __pa(pdc_result), hpa, __pa(tbl));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
 {
        int retval;
-       spin_lock_irq(&pdc_lock);
+       unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
        pdc_result[0] = 0;
        pdc_result[1] = 0;
        retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, 
                              __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
        return retval ? ~0 : (unsigned int) pdc_result[0];
 }
 
 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
 {
        int retval;
-       spin_lock_irq(&pdc_lock);
+       unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
        pdc_result[0] = 0;
        retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, 
                              __pa(pdc_result), hpa,
                              cfg_addr&~3UL, 4UL, (unsigned long) val);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
        return retval;
 }
 #endif /* UNTESTED CODE */
 int pdc_tod_read(struct pdc_tod *tod)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
         convert_to_wide(pdc_result);
         memcpy(tod, pdc_result, sizeof(*tod));
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_tod_set(unsigned long sec, unsigned long usec)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
                struct pdc_memory_table *tbl, unsigned long entries)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
        convert_to_wide(pdc_result);
        memcpy(r_addr, pdc_result, sizeof(*r_addr));
        memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
                               PDC_FIRM_TEST_MAGIC, ftc_bitmap);
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int pdc_do_reset(void)
 {
         int retval;
+       unsigned long flags;
 
-        spin_lock_irq(&pdc_lock);
+        spin_lock_irqsave(&pdc_lock, flags);
         retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, flags);
 
         return retval;
 }
 int __init pdc_soft_power_info(unsigned long *power_reg)
 {
        int retval;
+       unsigned long flags;
 
        *power_reg = (unsigned long) (-1);
        
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
        if (retval == PDC_OK) {
                 convert_to_wide(pdc_result);
                 *power_reg = f_extend(pdc_result[0]);
        }
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_soft_power_button(int sw_control)
 {
        int retval;
-       spin_lock_irq(&pdc_lock);
+       unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
+
        return retval;
 }
 
  */
 void pdc_io_reset(void)
 {
-       spin_lock_irq(&pdc_lock);  
+       unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
        mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 }
 
 /*
  */
 void pdc_io_reset_devices(void)
 {
-       spin_lock_irq(&pdc_lock);  
+       unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
        mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 }
 
 
                  unsigned long glob_cfg)
 {
         int retval;
+       unsigned long irqflags;
 
-        spin_lock_irq(&pdc_lock);  
+        spin_lock_irqsave(&pdc_lock, irqflags);  
         retval = real32_call(func, flags, inptr, outputr, glob_cfg);
-        spin_unlock_irq(&pdc_lock);
+        spin_unlock_irqrestore(&pdc_lock, irqflags);
 
         return retval;
 }
 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
        memcpy(cell_info, pdc_result, sizeof(*cell_info));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
                        unsigned long view_type, void *mem_addr)
 {
        int retval;
+       unsigned long flags;
        static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), 
                              ploc, mod, view_type, __pa(&result));
        if(!retval) {
                *actcnt = pdc_result[0];
                memcpy(mem_addr, &result, *actcnt);
        }
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
                              __pa(&pdc_result), hpa);
        memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
                              __pa(pdc_result), cell_num);
        *num_entries = pdc_result[0];
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
                              __pa(r_addr), cell_num);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
                            unsigned long count, unsigned long offset)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), 
                              __pa(pdc_result2), count, offset);
        *actual_len = pdc_result[0];
        memcpy(mem_addr, pdc_result2, *actual_len);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
 {
        int retval;
-       spin_lock_irq(&pdc_lock);
+       unsigned long flags;
+
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
                                        __pa(pdc_result), pci_addr, pci_size);
        switch(pci_size) {
                case 2: *(u16 *)mem_addr =  (u16) pdc_result[0];
                case 4: *(u32 *)mem_addr =  (u32) pdc_result[0];
        }
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }
 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
 {
        int retval;
+       unsigned long flags;
 
-       spin_lock_irq(&pdc_lock);
+       spin_lock_irqsave(&pdc_lock, flags);
        retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
                                pci_addr, pci_size, val);
-       spin_unlock_irq(&pdc_lock);
+       spin_unlock_irqrestore(&pdc_lock, flags);
 
        return retval;
 }