Commit 149974fd authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe
Browse files

block: add for_each_mp_bvec() 



Add helper of for_each_mp_bvec() for io_uring to import fixed kernel
buffer.

Signed-off-by: default avatarMing Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20250325135155.935398-3-ming.lei@redhat.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 8622b20f

include/linux/bvec.h

+6 −0
Original line number Diff line number Diff line
@@ -184,6 +184,12 @@ static inline void bvec_iter_advance_single(const struct bio_vec *bv, 
		((bvl = bvec_iter_bvec((bio_vec), (iter))), 1);	\

	     bvec_iter_advance_single((bio_vec), &(iter), (bvl).bv_len))



#define for_each_mp_bvec(bvl, bio_vec, iter, start)			\

	for (iter = (start);						\

	     (iter).bi_size &&						\

		((bvl = mp_bvec_iter_bvec((bio_vec), (iter))), 1);	\

	     bvec_iter_advance_single((bio_vec), &(iter), (bvl).bv_len))



/* for iterating one bio from start to end */

#define BVEC_ITER_ALL_INIT (struct bvec_iter)				\

{									\