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| author | Keith Busch <kbusch@kernel.org> | 2022-01-05 09:05:16 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-01-05 12:25:42 -0700 |
| commit | 3764fd05e1f89530e2ee5cbff0b638f2b1141b90 (patch) | |
| tree | 12008145c3422e06143814d4242f7a853def1713 /include/linux/blk-mq.h | |
| parent | edce22e19bfa86efa2522d041d6367f2f099e8ed (diff) | |
| download | linux-stable-3764fd05e1f89530e2ee5cbff0b638f2b1141b90.tar.gz linux-stable-3764fd05e1f89530e2ee5cbff0b638f2b1141b90.tar.bz2 linux-stable-3764fd05e1f89530e2ee5cbff0b638f2b1141b90.zip | |
block: introduce rq_list_for_each_safe macro
While iterating a list, a particular request may need to be removed for
special handling. Provide an iterator that can safely handle that.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20220105170518.3181469-3-kbusch@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blk-mq.h')
| -rw-r--r-- | include/linux/blk-mq.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index bf64b94cd64e..1467f0fa2142 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -242,6 +242,10 @@ static inline unsigned short req_get_ioprio(struct request *req) #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) |