[PATCH] bio_unmap_user(): original bio passed in

With the recent bio mapping changes, the caller must pass in the
original bio for unmapping again (and they do). So kill this dead code,
it could cause problems in situations where someone has used bi_private
for something else.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/bio.c

@@ -603,18 +603,6 @@ static void __bio_unmap_user(struct bio *bio)
 	struct bio_vec *bvec;
 	int i;
 
-	/*
-	 * find original bio if it was bounced
-	 */
-	if (bio->bi_private) {
-		/*
-		 * someone stole our bio, must not happen
-		 */
-		BUG_ON(!bio_flagged(bio, BIO_BOUNCED));
-	
-		bio = bio->bi_private;
-	}
-
 	/*
 	 * make sure we dirty pages we wrote to
 	 */