[PATCH 10/16] block: rename REQ_HIPRI to REQ_POLLED

Christoph Hellwig
2021-06-15T14:35:21Z

Unlike the RWF_HIPRI userspace ABI which is intentionally kept vague,
the bio flag is specific to the polling implementation, so rename and
document it properly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Tested-by: Mark Wunderlich <mark.wunderlich@intel.com>
---
block/blk-core.c | 2 +-
block/blk-merge.c | 2 +-
block/blk-mq-debugfs.c | 2 +-
block/blk-mq.c | 4 ++--
block/blk-mq.h | 4 ++--
drivers/nvme/host/core.c | 2 +-
drivers/scsi/scsi_debug.c | 10 +++++-----
include/linux/bio.h | 2 +-
include/linux/blk_types.h | 4 ++--
mm/page_io.c | 2 +-
10 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index 514838ccab2d..858a76858cb0 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -836,7 +836,7 @@ static noinline_for_stack bool submit_bio_checks(struct bio *bio)
}

if (!test_bit(QUEUE_FLAG_POLL, &q->queue_flags))
- bio->bi_opf &= ~REQ_HIPRI;
+ bio->bi_opf &= ~REQ_POLLED;

switch (bio_op(bio)) {
case REQ_OP_DISCARD:
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 4d97fb6dd226..5c9d2a4ece86 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -285,7 +285,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
* iopoll in direct IO routine. Given performance gain of iopoll for
* big IO can be trival, disable iopoll when split needed.
*/
- bio->bi_opf &= ~REQ_HIPRI;
+ bio->bi_opf &= ~REQ_POLLED;

return bio_split(bio, sectors, GFP_NOIO, bs);
}
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 2a75bc7401df..0b821b369ffd 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -286,7 +286,7 @@ static const char *const cmd_flag_name[] = {
CMD_FLAG_NAME(BACKGROUND),
CMD_FLAG_NAME(NOWAIT),
CMD_FLAG_NAME(NOUNMAP),
- CMD_FLAG_NAME(HIPRI),
+ CMD_FLAG_NAME(POLLED),
};
#undef CMD_FLAG_NAME

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 86e59ffcca44..a0cc1eedc15a 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -667,7 +667,7 @@ bool blk_mq_complete_request_remote(struct request *rq)
* For a polled request, always complete locallly, it's pointless
* to redirect the completion.
*/
- if (rq->cmd_flags & REQ_HIPRI)
+ if (rq->cmd_flags & REQ_POLLED)
return false;

if (blk_mq_complete_need_ipi(rq)) {
@@ -2220,7 +2220,7 @@ blk_qc_t blk_mq_submit_bio(struct bio *bio)

rq_qos_throttle(q, bio);

- hipri = bio->bi_opf & REQ_HIPRI;
+ hipri = bio->bi_opf & REQ_POLLED;

data.cmd_flags = bio->bi_opf;
rq = __blk_mq_alloc_request(&data);
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 4b1ca7b7bbeb..8444e00e8d25 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -109,9 +109,9 @@ static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q,
enum hctx_type type = HCTX_TYPE_DEFAULT;

/*
- * The caller ensure that if REQ_HIPRI, poll must be enabled.
+ * The caller ensure that if REQ_POLLED, poll must be enabled.
*/
- if (flags & REQ_HIPRI)
+ if (flags & REQ_POLLED)
type = HCTX_TYPE_POLL;
else if ((flags & REQ_OP_MASK) == REQ_OP_READ)
type = HCTX_TYPE_READ;
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 115c8d90530a..1f2ecb2fe9b1 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1027,7 +1027,7 @@ static void nvme_execute_rq_polled(struct request_queue *q,

WARN_ON_ONCE(!test_bit(QUEUE_FLAG_POLL, &q->queue_flags));

- rq->cmd_flags |= REQ_HIPRI;
+ rq->cmd_flags |= REQ_POLLED;
rq->end_io_data = &wait;
blk_execute_rq_nowait(bd_disk, rq, at_head, nvme_end_sync_rq);

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index a5d1633b5bd8..81384d28ff90 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -5367,7 +5367,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
{
bool new_sd_dp;
bool inject = false;
- bool hipri = (cmnd->request->cmd_flags & REQ_HIPRI);
+ bool polled = (cmnd->request->cmd_flags & REQ_POLLED);
int k, num_in_q, qdepth;
unsigned long iflags;
u64 ns_from_boot = 0;
@@ -5454,7 +5454,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
if (sdebug_host_max_queue)
sd_dp->hc_idx = get_tag(cmnd);

- if (hipri)
+ if (polled)
ns_from_boot = ktime_get_boottime_ns();

/* one of the resp_*() response functions is called here */
@@ -5514,7 +5514,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
kt -= d;
}
}
- if (hipri) {
+ if (polled) {
sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
spin_lock_irqsave(&sqp->qc_lock, iflags);
if (!sd_dp->init_poll) {
@@ -5545,7 +5545,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
atomic_read(&sdeb_inject_pending)))
sd_dp->aborted = true;
- if (hipri) {
+ if (polled) {
sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
spin_lock_irqsave(&sqp->qc_lock, iflags);
if (!sd_dp->init_poll) {
@@ -7313,7 +7313,7 @@ static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
if (kt_from_boot < sd_dp->cmpl_ts)
continue;

- } else /* ignoring non REQ_HIPRI requests */
+ } else /* ignoring non REQ_POLLED requests */
continue;
devip = (struct sdebug_dev_info *)scp->device->hostdata;
if (likely(devip))
diff --git a/include/linux/bio.h b/include/linux/bio.h
index d2b98efb5cc5..feaebd2367a0 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -813,7 +813,7 @@ static inline int bio_integrity_add_page(struct bio *bio, struct page *page,
*/
static inline void bio_set_polled(struct bio *bio, struct kiocb *kiocb)
{
- bio->bi_opf |= REQ_HIPRI;
+ bio->bi_opf |= REQ_POLLED;
if (!is_sync_kiocb(kiocb))
bio->bi_opf |= REQ_NOWAIT;
}
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 295addd38390..bb53aaa36caf 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -388,7 +388,7 @@ enum req_flag_bits {
/* command specific flags for REQ_OP_WRITE_ZEROES: */
__REQ_NOUNMAP, /* do not free blocks when zeroing */

- __REQ_HIPRI,
+ __REQ_POLLED, /* caller polls for completion using blk_poll */

/* for driver use */
__REQ_DRV,
@@ -413,7 +413,7 @@ enum req_flag_bits {
#define REQ_CGROUP_PUNT (1ULL << __REQ_CGROUP_PUNT)

#define REQ_NOUNMAP (1ULL << __REQ_NOUNMAP)
-#define REQ_HIPRI (1ULL << __REQ_HIPRI)
+#define REQ_POLLED (1ULL << __REQ_POLLED)

#define REQ_DRV (1ULL << __REQ_DRV)
#define REQ_SWAP (1ULL << __REQ_SWAP)
diff --git a/mm/page_io.c b/mm/page_io.c
index 5d5543fcefa4..ed2eded74f3a 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -416,7 +416,7 @@ int swap_readpage(struct page *page, bool synchronous)
* attempt to access it in the page fault retry time check.
*/
if (synchronous) {
- bio->bi_opf |= REQ_HIPRI;
+ bio->bi_opf |= REQ_POLLED;
get_task_struct(current);
bio->bi_private = current;
}