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: 21+ 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
2021-12-29 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
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