From: Arnd Bergmann <arnd@arndb.de>

After the rework, two files have a copy of drbd_nl_mcgrps[], but one
of them has no references:

drivers/block/drbd/drbd_nl_gen.c:641:42: error: 'drbd_nl_mcgrps' defined but not used [-Werror=unused-const-variable=]
  641 | static const struct genl_multicast_group drbd_nl_mcgrps[] = {
      |                                          ^~~~~~~~~~~~~~

At the default warning level, -Wunused-const-variables is turned off,
so this has gone unnoticed.

Remove the extra variable.

Fixes: 8098eeb693c4 ("drbd: replace genl_magic with explicit netlink serialization")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/block/drbd/drbd_nl_gen.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/block/drbd/drbd_nl_gen.c b/drivers/block/drbd/drbd_nl_gen.c
index fb44b948cec8..e133e8415205 100644
--- a/drivers/block/drbd/drbd_nl_gen.c
+++ b/drivers/block/drbd/drbd_nl_gen.c
@@ -638,10 +638,6 @@ const struct genl_split_ops drbd_nl_ops[32] = {
 	},
 };
 
-static const struct genl_multicast_group drbd_nl_mcgrps[] = {
-	[DRBD_NLGRP_EVENTS] = { "events", },
-};
-
 static int __drbd_cfg_context_from_attrs(struct drbd_cfg_context *s,
 		struct nlattr ***ret_nested_attribute_table,
 		struct genl_info *info)
-- 
2.39.5

On 5/19/26 22:30, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> After the rework, two files have a copy of drbd_nl_mcgrps[], but one
> of them has no references:
> 
> drivers/block/drbd/drbd_nl_gen.c:641:42: error: 'drbd_nl_mcgrps' defined but not used [-Werror=unused-const-variable=]
>    641 | static const struct genl_multicast_group drbd_nl_mcgrps[] = {
>        |                                          ^~~~~~~~~~~~~~
> 
> At the default warning level, -Wunused-const-variables is turned off,
> so this has gone unnoticed.
> 
> Remove the extra variable.
> 
> Fixes: 8098eeb693c4 ("drbd: replace genl_magic with explicit netlink serialization")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Oops, looks like a copy/paste error on my side.
Thanks for noticing and fixing.

Reviewed-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>