diff mbox series

[PATCHv3,1/2] block: make BLK_DEF_MAX_SECTORS unsigned

Message ID 20221227191009.2277326-1-kbusch@meta.com (mailing list archive)
State New, archived
Headers show
Series [PATCHv3,1/2] block: make BLK_DEF_MAX_SECTORS unsigned | expand

Commit Message

Keith Busch Dec. 27, 2022, 7:10 p.m. UTC 
From: Keith Busch <kbusch@kernel.org>

This is used as an unsigned value, so define it that way to avoid
having to cast it.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 block/blk-settings.c          | 2 +-
 drivers/block/null_blk/main.c | 3 +--
 include/linux/blkdev.h        | 3 ++-
 3 files changed, 4 insertions(+), 4 deletions(-)

Comments

Christoph Hellwig Dec. 28, 2022, 3:53 p.m. UTC | #1 
>  enum blk_default_limits {
>  	BLK_MAX_SEGMENTS	= 128,
>  	BLK_SAFE_MAX_SECTORS	= 255,
> -	BLK_DEF_MAX_SECTORS	= 2560,
>  	BLK_MAX_SEGMENT_SIZE	= 65536,
>  	BLK_SEG_BOUNDARY_MASK	= 0xFFFFFFFFUL,
>  };

Looking at the enum all these really should be unsigned values anyway,
so we might as well keep the enum.

Either way this looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 0477c4d527fee..9875ca131eb0c 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -135,7 +135,7 @@  void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_secto
 	limits->max_hw_sectors = max_hw_sectors;
 
 	max_sectors = min_not_zero(max_hw_sectors, limits->max_dev_sectors);
-	max_sectors = min_t(unsigned int, max_sectors, BLK_DEF_MAX_SECTORS);
+	max_sectors = min(max_sectors, BLK_DEF_MAX_SECTORS);
 	max_sectors = round_down(max_sectors,
 				 limits->logical_block_size >> SECTOR_SHIFT);
 	limits->max_sectors = max_sectors;
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 7d28e3aa406c2..4c601ca9552a0 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -2123,8 +2123,7 @@  static int null_add_dev(struct nullb_device *dev)
 	blk_queue_physical_block_size(nullb->q, dev->blocksize);
 	if (!dev->max_sectors)
 		dev->max_sectors = queue_max_hw_sectors(nullb->q);
-	dev->max_sectors = min_t(unsigned int, dev->max_sectors,
-				 BLK_DEF_MAX_SECTORS);
+	dev->max_sectors = min(dev->max_sectors, BLK_DEF_MAX_SECTORS);
 	blk_queue_max_hw_sectors(nullb->q, dev->max_sectors);
 
 	if (dev->virt_boundary)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 301cf1cf4f2fa..69f7199d38da8 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1095,11 +1095,12 @@  static inline bool bdev_is_partition(struct block_device *bdev)
 enum blk_default_limits {
 	BLK_MAX_SEGMENTS	= 128,
 	BLK_SAFE_MAX_SECTORS	= 255,
-	BLK_DEF_MAX_SECTORS	= 2560,
 	BLK_MAX_SEGMENT_SIZE	= 65536,
 	BLK_SEG_BOUNDARY_MASK	= 0xFFFFFFFFUL,
 };
 
+#define BLK_DEF_MAX_SECTORS 2560u
+
 static inline unsigned long queue_segment_boundary(const struct request_queue *q)
 {
 	return q->limits.seg_boundary_mask;