return bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);
struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);  if (bio) bio->bi_destructor = bio_fs_destructor;  return bio;
struct bio *bio_alloc(unsigned int __nocast gfp_mask, int nr_iovecs){	return bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);}