From: Ming Lei <[email protected]>
To: Jens Axboe <[email protected]>,
[email protected], Pavel Begunkov <[email protected]>
Cc: Caleb Sander Mateos <[email protected]>,
Ming Lei <[email protected]>
Subject: [PATCH 2/4] block: add for_each_mp_bvec()
Date: Tue, 25 Mar 2025 21:51:51 +0800 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
Add helper of for_each_mp_bvec() for io_uring to import fixed kernel
buffer.
Signed-off-by: Ming Lei <[email protected]>
---
include/linux/bvec.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index ba8f52d48b94..204b22a99c4b 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -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) \
{ \
--
2.47.0
next prev parent reply other threads:[~2025-03-25 13:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-25 13:51 [PATCH 0/4] io_uring: support vectored fixed kernel buffer Ming Lei
2025-03-25 13:51 ` [PATCH 1/4] io_uring: add validate_fixed_range() for validate fixed buffer Ming Lei
2025-03-25 16:00 ` Caleb Sander Mateos
2025-03-25 13:51 ` Ming Lei [this message]
2025-03-25 13:51 ` [PATCH 3/4] io_uring: support vectored kernel " Ming Lei
2025-03-25 13:51 ` [PATCH 4/4] selftests: ublk: enable zero copy for stripe target Ming Lei
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