[PATCH 6.1.y 1/4] block: simplify the disk_force_media_change interface

[Sasha Levin <sashal@kernel.org>]

From: Christoph Hellwig <hch@lst.de>

[ Upstream commit ab6860f62bfe329e11e5b5b7295b673c9c3a62d0 ]

Hard code the events to DISK_EVENT_MEDIA_CHANGE as that is the only
useful use case, and drop the superfluous return value.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Message-Id: <20230811100828.1897174-9-hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Stable-dep-of: 7e9a46004b47 ("block: set QUEUE_FLAG_DYING unconditionally in blk_mark_disk_dead()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 block/disk-events.c    | 15 ++++-----------
 drivers/block/loop.c   |  6 +++---
 include/linux/blkdev.h |  2 +-
 3 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/block/disk-events.c b/block/disk-events.c
index 450c2cbe23d56..c25b67c190a6c 100644
--- a/block/disk-events.c
+++ b/block/disk-events.c
@@ -294,25 +294,18 @@ EXPORT_SYMBOL(bdev_check_media_change);
  * @disk: the disk which will raise the event
  * @events: the events to raise
  *
- * Generate uevents for the disk. If DISK_EVENT_MEDIA_CHANGE is present,
- * attempt to free all dentries and inodes and invalidates all block
+ * Should be called when the media changes for @disk.  Generates a uevent
+ * and attempts to free all dentries and inodes and invalidates all block
  * device page cache entries in that case.
- *
- * Returns %true if DISK_EVENT_MEDIA_CHANGE was raised, or %false if not.
  */
-bool disk_force_media_change(struct gendisk *disk, unsigned int events)
+void disk_force_media_change(struct gendisk *disk)
 {
-	disk_event_uevent(disk, events);
-
-	if (!(events & DISK_EVENT_MEDIA_CHANGE))
-		return false;
-
+	disk_event_uevent(disk, DISK_EVENT_MEDIA_CHANGE);
 	inc_diskseq(disk);
 	if (__invalidate_device(disk->part0, true))
 		pr_warn("VFS: busy inodes on changed media %s\n",
 			disk->disk_name);
 	set_bit(GD_NEED_PART_SCAN, &disk->state);
-	return true;
 }
 EXPORT_SYMBOL_GPL(disk_force_media_change);
 
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index e3e5d533a7eca..a12a67947c682 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -598,7 +598,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
 		goto out_err;
 
 	/* and ... switch */
-	disk_force_media_change(lo->lo_disk, DISK_EVENT_MEDIA_CHANGE);
+	disk_force_media_change(lo->lo_disk);
 	blk_mq_freeze_queue(lo->lo_queue);
 	mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask);
 	lo->lo_backing_file = file;
@@ -1063,7 +1063,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	/* suppress uevents while reconfiguring the device */
 	dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 1);
 
-	disk_force_media_change(lo->lo_disk, DISK_EVENT_MEDIA_CHANGE);
+	disk_force_media_change(lo->lo_disk);
 	set_disk_ro(lo->lo_disk, (lo->lo_flags & LO_FLAGS_READ_ONLY) != 0);
 
 	lo->use_dio = lo->lo_flags & LO_FLAGS_DIRECT_IO;
@@ -1167,7 +1167,7 @@ static void __loop_clr_fd(struct loop_device *lo, bool release)
 	if (!release)
 		blk_mq_unfreeze_queue(lo->lo_queue);
 
-	disk_force_media_change(lo->lo_disk, DISK_EVENT_MEDIA_CHANGE);
+	disk_force_media_change(lo->lo_disk);
 
 	if (lo->lo_flags & LO_FLAGS_PARTSCAN) {
 		int err;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index de013fc37ef83..e57b6e77b3757 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -773,7 +773,7 @@ static inline int bdev_read_only(struct block_device *bdev)
 }
 
 bool set_capacity_and_notify(struct gendisk *disk, sector_t size);
-bool disk_force_media_change(struct gendisk *disk, unsigned int events);
+void disk_force_media_change(struct gendisk *disk);
 
 void add_disk_randomness(struct gendisk *disk) __latent_entropy;
 void rand_initialize_disk(struct gendisk *disk);
-- 
2.53.0