devlink: make all symbols GPL-only

devlink_alloc() and devlink_register() are both GPL.
A non-GPL module won't get far, so for consistency
we can make all symbols GPL without risking any real
life breakage.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/devlink.c

@@ -102,7 +102,7 @@ struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
 	.fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
 	.global = true,
 };
-EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
+EXPORT_SYMBOL_GPL(devlink_dpipe_header_ethernet);
 
 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
 	{
@@ -119,7 +119,7 @@ struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
 	.fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
 	.global = true,
 };
-EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
+EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv4);
 
 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
 	{
@@ -136,7 +136,7 @@ struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
 	.fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
 	.global = true,
 };
-EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
+EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv6);
 
 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
@@ -3365,7 +3365,7 @@ void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
 		kfree(value[value_index].mask);
 	}
 }
-EXPORT_SYMBOL(devlink_dpipe_entry_clear);
+EXPORT_SYMBOL_GPL(devlink_dpipe_entry_clear);
 
 static int devlink_dpipe_entries_fill(struct genl_info *info,
 				      enum devlink_command cmd, int flags,