+ mm-debug_page_alloc-fix-type-mismatch-for-debug_guardpage_minorder.patch added to mm-new branch

The patch titled
     Subject: mm: debug_page_alloc: fix type mismatch for debug_guardpage_minorder
has been added to the -mm mm-new branch.  Its filename is
     mm-debug_page_alloc-fix-type-mismatch-for-debug_guardpage_minorder.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-debug_page_alloc-fix-type-mismatch-for-debug_guardpage_minorder.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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------------------------------------------------------
From: Ye Liu <[email protected]>
Subject: mm: debug_page_alloc: fix type mismatch for debug_guardpage_minorder
Date: Wed, 5 Aug 2026 17:31:07 +0800

The debug_guardpage_minorder local variable is declared as unsigned int,
but debug_guardpage_minorder_setup() uses unsigned long and kstrtoul() to
parse the value.

Use kstrtouint() with unsigned int local variable to match the actual type
of _debug_guardpage_minorder.  Also fix the format specifier from %lu to
%u accordingly.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Ye Liu <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Zi Yan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 mm/debug_page_alloc.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/mm/debug_page_alloc.c~mm-debug_page_alloc-fix-type-mismatch-for-debug_guardpage_minorder
+++ a/mm/debug_page_alloc.c
@@ -20,14 +20,14 @@ early_param("debug_pagealloc", early_deb
 
 static int __init debug_guardpage_minorder_setup(char *buf)
 {
-	unsigned long res;
+	unsigned int res;
 
-	if (kstrtoul(buf, 10, &res) < 0 ||  res > MAX_PAGE_ORDER / 2) {
+	if (kstrtouint(buf, 10, &res) < 0 ||  res > MAX_PAGE_ORDER / 2) {
 		pr_err("Bad debug_guardpage_minorder value: %s\n", buf);
 		return 0;
 	}
 	_debug_guardpage_minorder = res;
-	pr_info("Setting debug_guardpage_minorder to %lu\n", res);
+	pr_info("Setting debug_guardpage_minorder to %u\n", res);
 	return 0;
 }
 early_param("debug_guardpage_minorder", debug_guardpage_minorder_setup);
_

Patches currently in -mm which might be from [email protected] are

mm-debug_page_alloc-fix-type-mismatch-for-debug_guardpage_minorder.patch