block: add a struct io_comp_batch argument to fops->iopoll()
struct io_comp_batch contains a list head and a completion handler, which
will allow completions to more effciently completed batches of IO.
For now, no functional changes in this patch, we just define the
io_comp_batch structure and add the argument to the file_operations iopoll
handler.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 74505b5..79c25b6 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -4174,14 +4174,14 @@ static bool blk_mq_poll_hybrid(struct request_queue *q, blk_qc_t qc)
}
static int blk_mq_poll_classic(struct request_queue *q, blk_qc_t cookie,
- unsigned int flags)
+ struct io_comp_batch *iob, unsigned int flags)
{
struct blk_mq_hw_ctx *hctx = blk_qc_to_hctx(q, cookie);
long state = get_current_state();
int ret;
do {
- ret = q->mq_ops->poll(hctx);
+ ret = q->mq_ops->poll(hctx, iob);
if (ret > 0) {
__set_current_state(TASK_RUNNING);
return ret;
@@ -4201,14 +4201,15 @@ static int blk_mq_poll_classic(struct request_queue *q, blk_qc_t cookie,
return 0;
}
-int blk_mq_poll(struct request_queue *q, blk_qc_t cookie, unsigned int flags)
+int blk_mq_poll(struct request_queue *q, blk_qc_t cookie, struct io_comp_batch *iob,
+ unsigned int flags)
{
if (!(flags & BLK_POLL_NOSLEEP) &&
q->poll_nsec != BLK_MQ_POLL_CLASSIC) {
if (blk_mq_poll_hybrid(q, cookie))
return 1;
}
- return blk_mq_poll_classic(q, cookie, flags);
+ return blk_mq_poll_classic(q, cookie, iob, flags);
}
unsigned int blk_mq_rq_cpu(struct request *rq)
