linux-kernel - [PATCH 29/44] drivers/xen: use min() instead of min

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Message-Id: <20251119224140.8616-30-david.laight.linux@gmail.com>
Date: Wed, 19 Nov 2025 22:41:25 +0000
From: david.laight.linux@...il.com
To: linux-kernel@...r.kernel.org
Cc: Juergen Gross <jgross@...e.com>,
	Stefano Stabellini <sstabellini@...nel.org>,
	David Laight <david.laight.linux@...il.com>
Subject: [PATCH 29/44] drivers/xen: 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.

Detected by an extra check added to min_t().

Signed-off-by: David Laight <david.laight.linux@...il.com>
---
 drivers/xen/grant-table.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 478d2ad725ac..3e76e33f6e08 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -1204,7 +1204,7 @@ void gnttab_foreach_grant_in_range(struct page *page,
 	unsigned int glen;
 	unsigned long xen_pfn;
 
-	len = min_t(unsigned int, PAGE_SIZE - offset, len);
+	len = min(PAGE_SIZE - offset, len);
 	goffset = xen_offset_in_page(offset);
 
 	xen_pfn = page_to_xen_pfn(page) + XEN_PFN_DOWN(offset);
-- 
2.39.5