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block: don't call invalidate_partition from blk_drop_partitions 

Given that the device must not be busy, most of the calls from
invalidate_partition that are related to file system metadata are
guranteed to not happen.  Just open code the calls to sync_blockdev
and invalidate_bdev instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-04-14 09:28:59 +02:00 committed by Jens Axboe
parent 21be6cdc00
commit e669c1da03
1 changed files with 3 additions and 4 deletions
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7
block/partitions/core.c
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@ -607,15 +607,14 @@ int blk_drop_partitions(struct block_device *bdev)
{
struct disk_part_iter piter;
struct hd_struct *part;
int res;
if (!disk_part_scan_enabled(bdev->bd_disk))
return 0;
if (bdev->bd_part_count || bdev->bd_openers > 1)
return -EBUSY;
res = invalidate_partition(bdev->bd_disk, 0);
if (res)
return res;
sync_blockdev(bdev);
invalidate_bdev(bdev);
disk_part_iter_init(&piter, bdev->bd_disk, DISK_PITER_INCL_EMPTY);
while ((part = disk_part_iter_next(&piter)))