if (!ret_buf.pointer) {
                        printk(KERN_ERR "%s:%s alloc for _HPP fail\n",
                                __FUNCTION__, (char *)string.pointer);
-                       acpi_os_free(string.pointer);
+                       kfree(string.pointer);
                        return AE_NO_MEMORY;
                }
                status = acpi_evaluate_object(handle, METHOD_NAME__HPP,
                if (ACPI_FAILURE(status)) {
                        pr_debug("%s:%s _HPP fail=0x%x\n", __FUNCTION__,
                                (char *)string.pointer, status);
-                       acpi_os_free(string.pointer);
+                       kfree(string.pointer);
                        return status;
                }
        }
        pr_debug("  _HPP: enable PERR    =0x%x\n", hpp->enable_perr);
 
 free_and_return:
-       acpi_os_free(string.pointer);
-       acpi_os_free(ret_buf.pointer);
+       kfree(string.pointer);
+       kfree(ret_buf.pointer);
        return status;
 }
 
                pr_debug("%s:%s OSHP passes\n", __FUNCTION__,
                        (char *)string.pointer);
 
-       acpi_os_free(string.pointer);
+       kfree(string.pointer);
        return status;
 }
 EXPORT_SYMBOL_GPL(acpi_run_oshp);
                if ((info->valid & ACPI_VALID_HID) &&
                        !strcmp(PCI_ROOT_HID_STRING,
                                        info->hardware_id.value)) {
-                       acpi_os_free(buffer.pointer);
+                       kfree(buffer.pointer);
                        return 1;
                }
                if (info->valid & ACPI_VALID_CID) {
                        for (i=0; i < info->compatibility_id.count; i++) {
                                if (!strcmp(PCI_ROOT_HID_STRING,
                                        info->compatibility_id.id[i].value)) {
-                                       acpi_os_free(buffer.pointer);
+                                       kfree(buffer.pointer);
                                        return 1;
                                }
                        }
                }
-               acpi_os_free(buffer.pointer);
+               kfree(buffer.pointer);
        }
        return 0;
 }
 
                if (ACPI_SUCCESS(status)) {
                        dbg("Gained control for hotplug HW for pci %s (%s)\n",
                                pci_name(dev), (char *)string.pointer);
-                       acpi_os_free(string.pointer);
+                       kfree(string.pointer);
                        return 0;
                }
                if (acpi_root_bridge(handle))
        err("Cannot get control of hotplug hardware for pci %s\n",
                        pci_name(dev));
 
-       acpi_os_free(string.pointer);
+       kfree(string.pointer);
        return -1;
 }
 #endif