linux-kernel - [PATCH v14 02/13] block: rearrange bdev_{is_zoned,zone_sectors,get

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Date:   Tue, 20 Sep 2022 11:11:08 +0200
From:   Pankaj Raghav <p.raghav@...sung.com>
To:     agk@...hat.com, snitzer@...nel.org, axboe@...nel.dk,
        damien.lemoal@...nsource.wdc.com, hch@....de
Cc:     gost.dev@...sung.com, jaegeuk@...nel.org,
        Johannes.Thumshirn@....com, hare@...e.de, bvanassche@....org,
        dm-devel@...hat.com, matias.bjorling@....com,
        linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
        pankydev8@...il.com, linux-block@...r.kernel.org,
        Pankaj Raghav <p.raghav@...sung.com>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Johannes Thumshirn <johannes.thumshirn@....com>
Subject: [PATCH v14 02/13] block: rearrange
 bdev_{is_zoned,zone_sectors,get_queue} helper in blkdev.h

Define bdev_is_zoned(), bdev_zone_sectors() and bdev_get_queue() earlier
in the blkdev.h include file. Simplify bdev_is_zoned() by removing the
superfluous NULL check for request queue while we are at it.

This commit has no functional change, and it is a prep patch for allowing
zoned devices with non-power-of-2 zone sizes in the block layer.

Reviewed-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Reviewed-by: Bart Van Assche <bvanassche@....org>
Reviewed-by: Chaitanya Kulkarni <kch@...dia.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@....com>
Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
---
 include/linux/blkdev.h | 43 +++++++++++++++++++-----------------------
 1 file changed, 19 insertions(+), 24 deletions(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 6c6bf4dd5709..6cf43f9384cc 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -635,6 +635,11 @@ static inline bool queue_is_mq(struct request_queue *q)
 	return q->mq_ops;
 }
 
+static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
+{
+	return bdev->bd_queue;	/* this is never NULL */
+}
+
 #ifdef CONFIG_PM
 static inline enum rpm_status queue_rpm_status(struct request_queue *q)
 {
@@ -666,6 +671,20 @@ static inline bool blk_queue_is_zoned(struct request_queue *q)
 	}
 }
 
+static inline bool bdev_is_zoned(struct block_device *bdev)
+{
+	return blk_queue_is_zoned(bdev_get_queue(bdev));
+}
+
+static inline sector_t bdev_zone_sectors(struct block_device *bdev)
+{
+	struct request_queue *q = bdev_get_queue(bdev);
+
+	if (!blk_queue_is_zoned(q))
+		return 0;
+	return q->limits.chunk_sectors;
+}
+
 #ifdef CONFIG_BLK_DEV_ZONED
 static inline unsigned int disk_nr_zones(struct gendisk *disk)
 {
@@ -892,11 +911,6 @@ int bio_poll(struct bio *bio, struct io_comp_batch *iob, unsigned int flags);
 int iocb_bio_iopoll(struct kiocb *kiocb, struct io_comp_batch *iob,
 			unsigned int flags);
 
-static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
-{
-	return bdev->bd_queue;	/* this is never NULL */
-}
-
 /* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */
 const char *blk_zone_cond_str(enum blk_zone_cond zone_cond);
 
@@ -1296,25 +1310,6 @@ static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev)
 	return BLK_ZONED_NONE;
 }
 
-static inline bool bdev_is_zoned(struct block_device *bdev)
-{
-	struct request_queue *q = bdev_get_queue(bdev);
-
-	if (q)
-		return blk_queue_is_zoned(q);
-
-	return false;
-}
-
-static inline sector_t bdev_zone_sectors(struct block_device *bdev)
-{
-	struct request_queue *q = bdev_get_queue(bdev);
-
-	if (!blk_queue_is_zoned(q))
-		return 0;
-	return q->limits.chunk_sectors;
-}
-
 static inline int queue_dma_alignment(const struct request_queue *q)
 {
 	return q ? q->dma_alignment : 511;
-- 
2.25.1