linux-kernel - [PATCH] block: remove devnode callback from struct block_device

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Date:   Sat,  3 Dec 2022 15:07:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH] block: remove devnode callback from struct block_device_operations

With the removal of the pktcdvd driver, there are no in-kernel users of
the devnode callback in struct block_device_operations, so it can be
safely removed.  If it is needed for new block drivers in the future, it
can be brought back.

Cc: Jens Axboe <axboe@...nel.dk>
Cc: linux-block@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 block/genhd.c          | 11 -----------
 include/linux/blkdev.h |  1 -
 2 files changed, 12 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 0f9769db2de8..1a2f3fa5678f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1193,21 +1193,10 @@ struct class block_class = {
 	.dev_uevent	= block_uevent,
 };
 
-static char *block_devnode(struct device *dev, umode_t *mode,
-			   kuid_t *uid, kgid_t *gid)
-{
-	struct gendisk *disk = dev_to_disk(dev);
-
-	if (disk->fops->devnode)
-		return disk->fops->devnode(disk, mode);
-	return NULL;
-}
-
 const struct device_type disk_type = {
 	.name		= "disk",
 	.groups		= disk_attr_groups,
 	.release	= disk_release,
-	.devnode	= block_devnode,
 };
 
 #ifdef CONFIG_PROC_FS
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 891f8cbcd043..b767c6b86856 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1413,7 +1413,6 @@ struct block_device_operations {
 	void (*swap_slot_free_notify) (struct block_device *, unsigned long);
 	int (*report_zones)(struct gendisk *, sector_t sector,
 			unsigned int nr_zones, report_zones_cb cb, void *data);
-	char *(*devnode)(struct gendisk *disk, umode_t *mode);
 	/* returns the length of the identifier or a negative errno: */
 	int (*get_unique_id)(struct gendisk *disk, u8 id[16],
 			enum blk_unique_id id_type);
-- 
2.38.1