dm-crypt: remove clone_init

Just open code it next to the bio allocations, which saves a few lines
of code, prepares for future changes and allows to remove the duplicate
bi_opf assignment for the bio_clone_fast case in kcryptd_io_read.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-7-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/md/dm-crypt.c

@@ -234,7 +234,7 @@ static volatile unsigned long dm_crypt_pages_per_client;
 #define DM_CRYPT_MEMORY_PERCENT			2
 #define DM_CRYPT_MIN_PAGES_PER_CLIENT		(BIO_MAX_VECS * 16)
 
-static void clone_init(struct dm_crypt_io *, struct bio *);
+static void crypt_endio(struct bio *clone);
 static void kcryptd_queue_crypt(struct dm_crypt_io *io);
 static struct scatterlist *crypt_get_sg_data(struct crypt_config *cc,
 					     struct scatterlist *sg);
@@ -1673,7 +1673,10 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned size)
 		mutex_lock(&cc->bio_alloc_lock);
 
 	clone = bio_alloc_bioset(GFP_NOIO, nr_iovecs, &cc->bs);
-	clone_init(io, clone);
+	clone->bi_private = io;
+	clone->bi_end_io = crypt_endio;
+	bio_set_dev(clone, cc->dev->bdev);
+	clone->bi_opf = io->base_bio->bi_opf;
 
 	remaining_size = size;
 
@@ -1826,16 +1829,6 @@ static void crypt_endio(struct bio *clone)
 	crypt_dec_pending(io);
 }
 
-static void clone_init(struct dm_crypt_io *io, struct bio *clone)
-{
-	struct crypt_config *cc = io->cc;
-
-	clone->bi_private = io;
-	clone->bi_end_io  = crypt_endio;
-	bio_set_dev(clone, cc->dev->bdev);
-	clone->bi_opf	  = io->base_bio->bi_opf;
-}
-
 static int kcryptd_io_read(struct dm_crypt_io *io, gfp_t gfp)
 {
 	struct crypt_config *cc = io->cc;
@@ -1850,10 +1843,12 @@ static int kcryptd_io_read(struct dm_crypt_io *io, gfp_t gfp)
 	clone = bio_clone_fast(io->base_bio, gfp, &cc->bs);
 	if (!clone)
 		return 1;
+	clone->bi_private = io;
+	clone->bi_end_io = crypt_endio;
+	bio_set_dev(clone, cc->dev->bdev);
 
 	crypt_inc_pending(io);
 
-	clone_init(io, clone);
 	clone->bi_iter.bi_sector = cc->start + io->sector;
 
 	if (dm_crypt_integrity_io_alloc(io, clone)) {