nvmet: mark nvmet_genctr static

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/nvme/target/discovery.c

@@ -18,7 +18,7 @@
 
 struct nvmet_subsys *nvmet_disc_subsys;
 
-u64 nvmet_genctr;
+static u64 nvmet_genctr;
 
 static void __nvmet_disc_changed(struct nvmet_port *port,
 				 struct nvmet_ctrl *ctrl)

drivers/nvme/target/nvmet.h

@@ -470,7 +470,6 @@ int __init nvmet_init_discovery(void);
 void nvmet_exit_discovery(void);
 
 extern struct nvmet_subsys *nvmet_disc_subsys;
-extern u64 nvmet_genctr;
 extern struct rw_semaphore nvmet_config_sem;
 
 extern u32 nvmet_ana_group_enabled[NVMET_MAX_ANAGRPS + 1];