Add one helper function for iterating all hardware queues in polling
mode.
Signed-off-by: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx>
---
include/linux/blk-mq.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index cf1910c6d5ae..0c511555ec16 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -574,6 +574,13 @@ static inline void *blk_mq_rq_to_pdu(struct request *rq)
for ((i) = 0; (i) < (q)->nr_hw_queues && \
({ hctx = (q)->queue_hw_ctx[i]; 1; }); (i)++)
+#define queue_for_each_poll_hw_ctx(q, hctx, i) \
+ for ((i) = 0; ((q)->tag_set->nr_maps > HCTX_TYPE_POLL) && \
+ (i) < (q)->tag_set->map[HCTX_TYPE_POLL].nr_queues && \
+ ({ int __idx = (q)->tag_set->map[HCTX_TYPE_POLL].queue_offset + (i); \
+ hctx = (q)->queue_hw_ctx[__idx]; 1; }); \
+ (i)++)
+
#define hctx_for_each_ctx(hctx, ctx, i) \
for ((i) = 0; (i) < (hctx)->nr_ctx && \
({ ctx = (hctx)->ctxs[(i)]; 1; }); (i)++)
--
2.27.0
