block: fix the count of PGPGOUT for WRITE_SAME

The vm counters is counted in sectors, so we should do the conversation
in submit_bio.

Fixes: 74d4699 ("block: replace bi_bdev with a gendisk pointer and partitions index")
Cc: [email protected]
Reviewed-by: Omar Sandoval <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jiufei Xue <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

block/blk-core.c

@@ -2434,7 +2434,7 @@ blk_qc_t submit_bio(struct bio *bio)
 		unsigned int count;
 
 		if (unlikely(bio_op(bio) == REQ_OP_WRITE_SAME))
-			count = queue_logical_block_size(bio->bi_disk->queue);
+			count = queue_logical_block_size(bio->bi_disk->queue) >> 9;
 		else
 			count = bio_sectors(bio);