nvme: rename nvme_mpath_shutdown_disk to nvme_mpath_remove_disk

In the NVMe context, the term "shutdown" has a specific technical
meaning. To avoid confusion, this commit renames the nvme_mpath_
shutdown_disk function to nvme_mpath_remove_disk to better reflect
its purpose (i.e. removing the disk from the system). However,
nvme_mpath_remove_disk was already in use, and its functionality
is related to releasing or putting the head node disk. To resolve
this naming conflict and improve clarity, the existing nvme_mpath_
remove_disk function is also renamed to nvme_mpath_put_disk.

This renaming improves code readability and better aligns function
names with their actual roles.

Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nilay Shroff <nilay@linux.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/core.c

@@ -668,7 +668,7 @@ static void nvme_free_ns_head(struct kref *ref)
 	struct nvme_ns_head *head =
 		container_of(ref, struct nvme_ns_head, ref);
 
-	nvme_mpath_remove_disk(head);
+	nvme_mpath_put_disk(head);
 	ida_free(&head->subsys->ns_ida, head->instance);
 	cleanup_srcu_struct(&head->srcu);
 	nvme_put_subsystem(head->subsys);
@@ -4214,7 +4214,7 @@ static void nvme_ns_remove(struct nvme_ns *ns)
 	synchronize_srcu(&ns->ctrl->srcu);
 
 	if (last_path)
-		nvme_mpath_shutdown_disk(ns->head);
+		nvme_mpath_remove_disk(ns->head);
 	nvme_put_ns(ns);
 }
 

drivers/nvme/host/multipath.c

@@ -698,15 +698,15 @@ static void nvme_remove_head_work(struct work_struct *work)
 {
 	struct nvme_ns_head *head = container_of(to_delayed_work(work),
 			struct nvme_ns_head, remove_work);
-	bool shutdown = false;
+	bool remove = false;
 
 	mutex_lock(&head->subsys->lock);
 	if (list_empty(&head->list)) {
 		list_del_init(&head->entry);
-		shutdown = true;
+		remove = true;
 	}
 	mutex_unlock(&head->subsys->lock);
-	if (shutdown)
+	if (remove)
 		nvme_remove_head(head);
 
 	module_put(THIS_MODULE);
@@ -1286,9 +1286,9 @@ void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid)
 #endif
 }
 
-void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
+void nvme_mpath_remove_disk(struct nvme_ns_head *head)
 {
-	bool shutdown = false;
+	bool remove = false;
 
 	mutex_lock(&head->subsys->lock);
 	/*
@@ -1314,15 +1314,15 @@ void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
 				head->delayed_removal_secs * HZ);
 	} else {
 		list_del_init(&head->entry);
-		shutdown = true;
+		remove = true;
 	}
 out:
 	mutex_unlock(&head->subsys->lock);
-	if (shutdown)
+	if (remove)
 		nvme_remove_head(head);
 }
 
-void nvme_mpath_remove_disk(struct nvme_ns_head *head)
+void nvme_mpath_put_disk(struct nvme_ns_head *head)
 {
 	if (!head->disk)
 		return;

drivers/nvme/host/nvme.h

@@ -966,7 +966,7 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
 void nvme_mpath_add_sysfs_link(struct nvme_ns_head *ns);
 void nvme_mpath_remove_sysfs_link(struct nvme_ns *ns);
 void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid);
-void nvme_mpath_remove_disk(struct nvme_ns_head *head);
+void nvme_mpath_put_disk(struct nvme_ns_head *head);
 int nvme_mpath_init_identify(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id);
 void nvme_mpath_init_ctrl(struct nvme_ctrl *ctrl);
 void nvme_mpath_update(struct nvme_ctrl *ctrl);
@@ -975,7 +975,7 @@ void nvme_mpath_stop(struct nvme_ctrl *ctrl);
 bool nvme_mpath_clear_current_path(struct nvme_ns *ns);
 void nvme_mpath_revalidate_paths(struct nvme_ns *ns);
 void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl);
-void nvme_mpath_shutdown_disk(struct nvme_ns_head *head);
+void nvme_mpath_remove_disk(struct nvme_ns_head *head);
 void nvme_mpath_start_request(struct request *rq);
 void nvme_mpath_end_request(struct request *rq);
 
@@ -1025,7 +1025,7 @@ static inline int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,
 static inline void nvme_mpath_add_disk(struct nvme_ns *ns, __le32 anagrpid)
 {
 }
-static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
+static inline void nvme_mpath_put_disk(struct nvme_ns_head *head)
 {
 }
 static inline void nvme_mpath_add_sysfs_link(struct nvme_ns *ns)
@@ -1044,7 +1044,7 @@ static inline void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
 static inline void nvme_mpath_clear_ctrl_paths(struct nvme_ctrl *ctrl)
 {
 }
-static inline void nvme_mpath_shutdown_disk(struct nvme_ns_head *head)
+static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
 {
 }
 static inline void nvme_trace_bio_complete(struct request *req)