[PATCH 2/3] mm/debug_page_alloc: improve error message for invalid guardpage minorder

[Ye Liu <ye.liu@linux.dev>]

From: Ye Liu <liuye@kylinos.cn>

When an invalid debug_guardpage_minorder value is provided, include the
user input in the error message. This helps users and developers diagnose
configuration issues more easily.

No functional change.

Signed-off-by: Ye Liu <liuye@kylinos.cn>
---
 mm/debug_page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/debug_page_alloc.c b/mm/debug_page_alloc.c
index d46acf989dde..6a26eca546c3 100644
--- a/mm/debug_page_alloc.c
+++ b/mm/debug_page_alloc.c
@@ -23,7 +23,7 @@ static int __init debug_guardpage_minorder_setup(char *buf)
 	unsigned long res;
 
 	if (kstrtoul(buf, 10, &res) < 0 ||  res > MAX_PAGE_ORDER / 2) {
-		pr_err("Bad debug_guardpage_minorder value\n");
+		pr_err("Bad debug_guardpage_minorder value: %s\n", buf);
 		return 0;
 	}
 	_debug_guardpage_minorder = res;
-- 
2.25.1