Patch "block: make BLK_DEF_MAX_SECTORS unsigned" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    block: make BLK_DEF_MAX_SECTORS unsigned

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     block-make-blk_def_max_sectors-unsigned.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 68a2488888605f15f5040f4e5e3cc083580bd74b
Author: Keith Busch <kbusch@xxxxxxxxxx>
Date:   Thu Jan 5 12:51:45 2023 -0800

    block: make BLK_DEF_MAX_SECTORS unsigned
    
    [ Upstream commit 0a26f327e46c203229e72c823dfec71a2b405ec5 ]
    
    This is used as an unsigned value, so define it that way to avoid
    having to cast it.
    
    Suggested-by: Christoph Hellwig <hch@xxxxxx>
    Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
    Reviewed-by: Christoph Hellwig <hch@xxxxxx>
    Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
    Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230105205146.3610282-2-kbusch@xxxxxxxx
    Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
    Stable-dep-of: 9a9525de8654 ("null_blk: don't cap max_hw_sectors to BLK_DEF_MAX_SECTORS")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 73a80895e3ae..959b5c1e6d3b 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -136,7 +136,7 @@ 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 686ec6bcdef3..4a867233b14a 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1902,8 +1902,7 @@ 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 67344dfe07a7..905844172cfd 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1334,11 +1334,12 @@ 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;