From: Keith Busch <kbusch@kernel.org>
To: linux-nvme@lists.infradead.org, linux-block@vger.kernel.org,
axboe@kernel.dk
Cc: hch@lst.de, sagi@grimberg.me, Keith Busch <kbusch@kernel.org>
Subject: [PATCHv2 1/3] block: introduce rq_list_for_each_safe macro
Date: Mon, 27 Dec 2021 08:41:36 -0800 [thread overview]
Message-ID: <20211227164138.2488066-1-kbusch@kernel.org> (raw)
While iterating a list, a particular request may need to be removed for
special handling. Provide an iterator that can safely handle that.
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
include/linux/blkdev.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 22746b2d6825..c4597ccdaf26 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1365,6 +1365,10 @@ struct io_comp_batch {
#define rq_list_for_each(listptr, pos) \
for (pos = rq_list_peek((listptr)); pos; pos = rq_list_next(pos))
+#define rq_list_for_each_safe(listptr, pos, nxt) \
+ for (pos = rq_list_peek((listptr)), nxt = rq_list_next(pos); \
+ pos; pos = nxt, nxt = pos ? rq_list_next(pos) : NULL)
+
#define rq_list_next(rq) (rq)->rq_next
#define rq_list_empty(list) ((list) == (struct request *) NULL)
--
2.25.4
next reply other threads:[~2021-12-27 16:41 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-27 16:41 Keith Busch [this message]
2021-12-27 16:41 ` [PATCHv2 2/3] block: introduce rq_list_move Keith Busch
2021-12-27 18:49 ` kernel test robot
2021-12-27 18:49 ` kernel test robot
2021-12-29 17:41 ` Christoph Hellwig
2021-12-29 20:59 ` Keith Busch
2021-12-27 16:41 ` [PATCHv2 3/3] nvme-pci: fix queue_rqs list splitting Keith Busch
2021-12-29 17:46 ` Christoph Hellwig
2021-12-29 21:04 ` Keith Busch
2021-12-30 7:53 ` Christoph Hellwig
2022-01-04 19:38 ` Keith Busch
2022-01-05 7:35 ` Christoph Hellwig
2021-12-29 17:39 ` [PATCHv2 1/3] block: introduce rq_list_for_each_safe macro Christoph Hellwig
2021-12-29 20:57 ` Keith Busch
2021-12-30 14:38 ` Max Gurtovoy
2021-12-30 15:30 ` Keith Busch
2022-01-03 15:23 ` Max Gurtovoy
2022-01-03 18:15 ` Keith Busch
2022-01-04 12:15 ` Max Gurtovoy
2022-01-05 17:26 ` Keith Busch
2022-01-06 11:54 ` Max Gurtovoy
2022-01-06 13:41 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211227164138.2488066-1-kbusch@kernel.org \
--to=kbusch@kernel.org \
--cc=axboe@kernel.dk \
--cc=hch@lst.de \
--cc=linux-block@vger.kernel.org \
--cc=linux-nvme@lists.infradead.org \
--cc=sagi@grimberg.me \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.