block: remove BIO_BUG_ON

BIO_DEBUG is always defined, so just switch the two instances to use
BUG_ON directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211012161804.991559-2-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/bio.c

@@ -156,7 +156,7 @@ static void bio_put_slab(struct bio_set *bs)
 
 void bvec_free(mempool_t *pool, struct bio_vec *bv, unsigned short nr_vecs)
 {
-	BIO_BUG_ON(nr_vecs > BIO_MAX_VECS);
+	BUG_ON(nr_vecs > BIO_MAX_VECS);
 
 	if (nr_vecs == BIO_MAX_VECS)
 		mempool_free(bv, pool);
@@ -677,7 +677,7 @@ static void bio_alloc_cache_destroy(struct bio_set *bs)
 void bio_put(struct bio *bio)
 {
 	if (unlikely(bio_flagged(bio, BIO_REFFED))) {
-		BIO_BUG_ON(!atomic_read(&bio->__bi_cnt));
+		BUG_ON(!atomic_read(&bio->__bi_cnt));
 		if (!atomic_dec_and_test(&bio->__bi_cnt))
 			return;
 	}

include/linux/bio.h

@@ -11,14 +11,6 @@
 #include <linux/blk_types.h>
 #include <linux/uio.h>
 
-#define BIO_DEBUG
-
-#ifdef BIO_DEBUG
-#define BIO_BUG_ON	BUG_ON
-#else
-#define BIO_BUG_ON
-#endif
-
 #define BIO_MAX_VECS		256U
 
 static inline unsigned int bio_max_segs(unsigned int nr_segs)