linux-kernel - [PATCH 12/44] block: use min() instead of min

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Message-Id: <20251119224140.8616-13-david.laight.linux@gmail.com>
Date: Wed, 19 Nov 2025 22:41:08 +0000
From: david.laight.linux@...il.com
To: linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org,
	linux-block@...r.kernel.org,
	linux-efi@...r.kernel.org
Cc: Davidlohr Bueso <dave@...olabs.net>,
	Jens Axboe <axboe@...nel.dk>,
	Josef Bacik <josef@...icpanda.com>,
	Tejun Heo <tj@...nel.org>,
	David Laight <david.laight.linux@...il.com>
Subject: [PATCH 12/44] block: use min() instead of min_t()

From: David Laight <david.laight.linux@...il.com>

min_t(unsigned int, a, b) casts an 'unsigned long' to 'unsigned int'.
Use min(a, b) instead as it promotes any 'unsigned int' to 'unsigned long'
and so cannot discard significant bits.

In this case the 'unsigned long' value is small enough that the result
is ok.

(Similarly for max_t() and clamp_t().)

Detected by an extra check added to min_t().

Signed-off-by: David Laight <david.laight.linux@...il.com>
---
 block/blk-iocost.c     | 6 ++----
 block/blk-settings.c   | 2 +-
 block/partitions/efi.c | 3 +--
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 5bfd70311359..a0416927d33d 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2334,10 +2334,8 @@ static void ioc_timer_fn(struct timer_list *timer)
 			else
 				usage_dur = max_t(u64, now.now - ioc->period_at, 1);
 
-			usage = clamp_t(u32,
-				DIV64_U64_ROUND_UP(usage_us * WEIGHT_ONE,
-						   usage_dur),
-				1, WEIGHT_ONE);
+			usage = clamp(DIV64_U64_ROUND_UP(usage_us * WEIGHT_ONE, usage_dur),
+				      1, WEIGHT_ONE);
 
 			/*
 			 * Already donating or accumulated enough to start.
diff --git a/block/blk-settings.c b/block/blk-settings.c
index d74b13ec8e54..4e0c23e68fac 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -472,7 +472,7 @@ int blk_validate_limits(struct queue_limits *lim)
 		seg_size = lim->max_segment_size;
 	else
 		seg_size = lim->seg_boundary_mask + 1;
-	lim->min_segment_size = min_t(unsigned int, seg_size, PAGE_SIZE);
+	lim->min_segment_size = min(seg_size, PAGE_SIZE);
 
 	/*
 	 * We require drivers to at least do logical block aligned I/O, but
diff --git a/block/partitions/efi.c b/block/partitions/efi.c
index 7acba66eed48..638261e9f2fb 100644
--- a/block/partitions/efi.c
+++ b/block/partitions/efi.c
@@ -215,8 +215,7 @@ static int is_pmbr_valid(legacy_mbr *mbr, sector_t total_sectors)
 		sz = le32_to_cpu(mbr->partition_record[part].size_in_lba);
 		if (sz != (uint32_t) total_sectors - 1 && sz != 0xFFFFFFFF)
 			pr_debug("GPT: mbr size in lba (%u) different than whole disk (%u).\n",
-				 sz, min_t(uint32_t,
-					   total_sectors - 1, 0xFFFFFFFF));
+				 sz, (uint32_t)min(total_sectors - 1, 0xFFFFFFFF));
 	}
 done:
 	return ret;
-- 
2.39.5