linux-kernel - [PATCH 03/14] drbd: remove RB_CONGESTED

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Date:   Wed, 22 Jul 2020 08:25:41 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Song Liu <song@...nel.org>, Hans de Goede <hdegoede@...hat.com>,
        Richard Weinberger <richard@....at>,
        Minchan Kim <minchan@...nel.org>,
        linux-mtd@...ts.infradead.org, dm-devel@...hat.com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        drbd-dev@...ts.linbit.com, linux-raid@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        cgroups@...r.kernel.org
Subject: [PATCH 03/14] drbd: remove RB_CONGESTED_REMOTE

This case isn't ever used.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/block/drbd/drbd_req.c | 4 ----
 include/linux/drbd.h          | 1 -
 2 files changed, 5 deletions(-)

diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 674be09b2da94a..4d944f2eb56efa 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -901,13 +901,9 @@ static bool drbd_may_do_local_read(struct drbd_device *device, sector_t sector,
 static bool remote_due_to_read_balancing(struct drbd_device *device, sector_t sector,
 		enum drbd_read_balancing rbm)
 {
-	struct backing_dev_info *bdi;
 	int stripe_shift;
 
 	switch (rbm) {
-	case RB_CONGESTED_REMOTE:
-		bdi = device->ldev->backing_bdev->bd_disk->queue->backing_dev_info;
-		return bdi_read_congested(bdi);
 	case RB_LEAST_PENDING:
 		return atomic_read(&device->local_cnt) >
 			atomic_read(&device->ap_pending_cnt) + atomic_read(&device->rs_pending_cnt);
diff --git a/include/linux/drbd.h b/include/linux/drbd.h
index 5755537b51b114..6a8286132751df 100644
--- a/include/linux/drbd.h
+++ b/include/linux/drbd.h
@@ -94,7 +94,6 @@ enum drbd_read_balancing {
 	RB_PREFER_REMOTE,
 	RB_ROUND_ROBIN,
 	RB_LEAST_PENDING,
-	RB_CONGESTED_REMOTE,
 	RB_32K_STRIPING,
 	RB_64K_STRIPING,
 	RB_128K_STRIPING,
-- 
2.27.0