block: unhash the inode earlier in delete_partition

Move the call to remove_inode_hash to the beginning of delete_partition,
as we want to prevent opening a block_device that is about to be removed
ASAP.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Link: https://lore.kernel.org/r/20230601094459.1350643-7-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/partitions/core.c

@@ -267,6 +267,12 @@ static void delete_partition(struct block_device *part)
 {
 	lockdep_assert_held(&part->bd_disk->open_mutex);
 
+	/*
+	 * Remove the block device from the inode hash, so that it cannot be
+	 * looked up any more even when openers still hold references.
+	 */
+	remove_inode_hash(part->bd_inode);
+
 	fsync_bdev(part);
 	__invalidate_device(part, true);
 
@@ -274,12 +280,6 @@ static void delete_partition(struct block_device *part)
 	kobject_put(part->bd_holder_dir);
 	device_del(&part->bd_device);
 
-	/*
-	 * Remove the block device from the inode hash, so that it cannot be
-	 * looked up any more even when openers still hold references.
-	 */
-	remove_inode_hash(part->bd_inode);
-
 	put_device(&part->bd_device);
 }