ACPI: export ACPI events via acpi_mc_group multicast group

This is an incremental patch for the recent genetlink
multicast changes.

Now ACPI events are exported via generic netlink multicast group.

Thanks for Johannes' help on developing this patch
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/event.c

@@ -132,30 +132,19 @@ enum {
 };
 #define ACPI_GENL_CMD_MAX (__ACPI_GENL_CMD_MAX - 1)
 
-#define ACPI_GENL_NAME		"acpi_event"
+#define ACPI_GENL_FAMILY_NAME		"acpi_event"
 #define ACPI_GENL_VERSION		0x01
+#define ACPI_GENL_MCAST_GROUP_NAME 	"acpi_mc_group"
 
 static struct genl_family acpi_event_genl_family = {
 	.id = GENL_ID_GENERATE,
-	.name = ACPI_GENL_NAME,
+	.name = ACPI_GENL_FAMILY_NAME,
 	.version = ACPI_GENL_VERSION,
 	.maxattr = ACPI_GENL_ATTR_MAX,
 };
 
-/* .doit: standard command callback */
-static int acpi_genl_cmd_event(struct sk_buff *skb, struct genl_info *info)
-{
-	struct acpi_genl_event *event = info->userhdr;
-
-	if (!event)
-		ACPI_DEBUG_PRINT((ACPI_DB_WARN, "ACPI event: NULL\n"));
-
-	return 0;
-}
-
-static struct genl_ops acpi_event_genl_ops = {
-	.cmd = ACPI_GENL_CMD_EVENT,
-	.doit = acpi_genl_cmd_event,
+static struct genl_multicast_group acpi_event_mcgrp = {
+	.name = ACPI_GENL_MCAST_GROUP_NAME,
 };
 
 int acpi_bus_generate_genetlink_event(struct acpi_device *device,
@@ -215,7 +204,7 @@ int acpi_bus_generate_genetlink_event(struct acpi_device *device,
 	}
 
 	result =
-	    genlmsg_multicast(skb, 0, acpi_event_genl_family.id, GFP_ATOMIC);
+	    genlmsg_multicast(skb, 0, acpi_event_mcgrp.id, GFP_ATOMIC);
 	if (result)
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 				  "Failed to send a Genetlink message!\n"));
@@ -230,8 +219,8 @@ static int acpi_event_genetlink_init(void)
 	if (result)
 		return result;
 
-	result =
-	    genl_register_ops(&acpi_event_genl_family, &acpi_event_genl_ops);
+	result = genl_register_mc_group(&acpi_event_genl_family,
+					&acpi_event_mcgrp);
 	if (result)
 		genl_unregister_family(&acpi_event_genl_family);