block: integrity cleanups

- No need to check for NULL bio, we'll get an immediate oops anyway.
- Make bio_integrity() a proper function.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

include/linux/bio.h

@@ -458,7 +458,14 @@ static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx,
 #define bip_for_each_vec(bvl, bip, i)					\
 	__bip_for_each_vec(bvl, bip, i, (bip)->bip_idx)
 
-#define bio_integrity(bio)	((bio)->bi_integrity ? 1 : 0)
+static inline int bio_integrity(struct bio *bio)
+{
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
+	return bio->bi_integrity != NULL;
+#else
+	return 0;
+#endif
+}
 
 extern struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *, gfp_t, unsigned int, struct bio_set *);
 extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int);

include/linux/blkdev.h

@@ -860,7 +860,6 @@ void kblockd_flush_work(struct work_struct *work);
 #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
 	MODULE_ALIAS("block-major-" __stringify(major) "-*")
 
-
 #if defined(CONFIG_BLK_DEV_INTEGRITY)
 
 #define INTEGRITY_FLAG_READ	1	/* verify data integrity on read */
@@ -945,8 +944,6 @@ static inline int bdev_integrity_enabled(struct block_device *bdev, int rw)
 
 static inline int blk_integrity_rq(struct request *rq)
 {
-	BUG_ON(rq->bio == NULL);
-
 	return bio_integrity(rq->bio);
 }
 
@@ -963,7 +960,6 @@ static inline int blk_integrity_rq(struct request *rq)
 
 #endif /* CONFIG_BLK_DEV_INTEGRITY */
 
-
 #else /* CONFIG_BLOCK */
 /*
  * stubs for when the block layer is configured out