The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 11eb695feb636fa5211067189cad25ac073e7fe5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '1678087561207107@kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

11eb695feb63 ("block: clear bio->bi_bdev when putting a bio back in the cache") f25cf75a4521 ("bio: split pcpu cache part of bio_put into a helper") d4347d50407d ("bio: safeguard REQ_ALLOC_CACHE bio put") 0df71650c051 ("block: allow using the per-cpu bio cache from bio_alloc_bioset") 49add4966d79 ("block: pass a block_device and opf to bio_init") 07888c665b40 ("block: pass a block_device and opf to bio_alloc") b77c88c2100c ("block: pass a block_device and opf to bio_alloc_kiocb") 609be1066731 ("block: pass a block_device and opf to bio_alloc_bioset") 0a3140ea0fae ("block: pass a block_device and opf to blk_next_bio") 3b005bf6acf0 ("block: move blk_next_bio to bio.c") 7d8d0c658d48 ("xen-blkback: bio_alloc can't fail if it is allow to sleep") d7b78de2b155 ("rnbd-srv: remove struct rnbd_dev_blk_io") 1fe0640ff94f ("rnbd-srv: simplify bio mapping in process_rdma") 4b1dc86d1857 ("drbd: bio_alloc can't fail if it is allow to sleep") 3f868c09ea8f ("dm-crypt: remove clone_init") 53db984e004c ("dm: bio_alloc can't fail if it is allowed to sleep") 39146b6f66ba ("ntfs3: remove ntfs_alloc_bio") 5d2ca2132f88 ("nfs/blocklayout: remove bl_alloc_init_bio") f0d911927b3c ("nilfs2: remove nilfs_alloc_seg_bio") d5f68a42da7a ("fs: remove mpage_alloc")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 11eb695feb636fa5211067189cad25ac073e7fe5 Mon Sep 17 00:00:00 2001 From: Jens Axboe axboe@kernel.dk Date: Fri, 24 Feb 2023 09:59:44 -0700 Subject: [PATCH] block: clear bio->bi_bdev when putting a bio back in the cache

This isn't strictly needed in terms of correctness, but it does allow polling to know if the bio has been put already by a different task and hence avoid polling something that we don't need to.

Cc: stable@vger.kernel.org Fixes: be4d234d7aeb ("bio: add allocation cache abstraction") Reviewed-by: Keith Busch kbusch@kernel.org Signed-off-by: Jens Axboe axboe@kernel.dk

diff --git a/block/bio.c b/block/bio.c index 2693f34afb7e..605c40025068 100644 --- a/block/bio.c +++ b/block/bio.c @@ -772,6 +772,7 @@ static inline void bio_put_percpu_cache(struct bio *bio)

if ((bio->bi_opf & REQ_POLLED) && !WARN_ON_ONCE(in_interrupt())) { bio->bi_next = cache->free_list; + bio->bi_bdev = NULL; cache->free_list = bio; cache->nr++; } else {