block: change return type to void

Now that all the callers of __blkdev_issue_discard() have been changed
to ignore its return value, change its return type from int to void.

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: Chaitanya Kulkarni

block/blk-lib.c

@@ -60,15 +60,14 @@ struct bio *blk_alloc_discard_bio(struct block_device *bdev,
 	return bio;
 }
 
-int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
+void __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 		sector_t nr_sects, gfp_t gfp_mask, struct bio **biop)
 {
 	struct bio *bio;
 
 	while ((bio = blk_alloc_discard_bio(bdev, &sector, &nr_sects,
 			gfp_mask)))
 		*biop = bio_chain_and_submit(*biop, bio);
-	return 0;
 }
 EXPORT_SYMBOL(__blkdev_issue_discard);
 

include/linux/blkdev.h

@@ -1259,7 +1259,7 @@ extern void blk_io_schedule(void);
 
 int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 		sector_t nr_sects, gfp_t gfp_mask);
-int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
+void __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 		sector_t nr_sects, gfp_t gfp_mask, struct bio **biop);
 int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector,
 		sector_t nr_sects, gfp_t gfp);