block: remove (__)blkdev_reread_part as an exported API
In general drivers should never mess with partition tables directly.
Unfortunately s390 and loop do for somewhat historic reasons, but they
can use bdev_disk_changed directly instead when we export it as they
satisfy the sanity checks we have in __blkdev_reread_part.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com> [dasd]
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index ef6e251..739b372 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -640,7 +640,9 @@ static void loop_reread_partitions(struct loop_device *lo,
{
int rc;
- rc = blkdev_reread_part(bdev);
+ mutex_lock(&bdev->bd_mutex);
+ rc = bdev_disk_changed(bdev, false);
+ mutex_unlock(&bdev->bd_mutex);
if (rc)
pr_warn("%s: partition scan of loop%d (%s) failed (rc=%d)\n",
__func__, lo->lo_number, lo->lo_file_name, rc);
@@ -1164,10 +1166,11 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
* must be at least one and it can only become zero when the
* current holder is released.
*/
- if (release)
- err = __blkdev_reread_part(bdev);
- else
- err = blkdev_reread_part(bdev);
+ if (!release)
+ mutex_lock(&bdev->bd_mutex);
+ err = bdev_disk_changed(bdev, false);
+ if (!release)
+ mutex_unlock(&bdev->bd_mutex);
if (err)
pr_warn("%s: partition scan of loop%d failed (rc=%d)\n",
__func__, lo_number, err);
