linux-kernel - [PATCH] mm: Use strtobool for param parsing

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Date:   Sun, 27 Feb 2022 18:10:39 +0000
From:   "Dr. David Alan Gilbert" <linux@...blig.org>
To:     akpm@...ux-foundation.org, pasha.tatashin@...een.com,
        songmuchun@...edance.com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        "Dr. David Alan Gilbert" <linux@...blig.org>
Subject: [PATCH] mm: Use strtobool for param parsing

Use strtobool rather than open coding "on" and "off" parsing in
mm/hugetlb_vmemmap.c and mm/page_table_check.c.

Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>
---
 mm/hugetlb_vmemmap.c  | 12 +-----------
 mm/page_table_check.c | 10 +---------
 2 files changed, 2 insertions(+), 20 deletions(-)

diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index c540c21e26f5b..919411386e547 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -192,17 +192,7 @@ static int __init early_hugetlb_free_vmemmap_param(char *buf)
 		return 0;
 	}
 
-	if (!buf)
-		return -EINVAL;
-
-	if (!strcmp(buf, "on"))
-		hugetlb_free_vmemmap_enabled = true;
-	else if (!strcmp(buf, "off"))
-		hugetlb_free_vmemmap_enabled = false;
-	else
-		return -EINVAL;
-
-	return 0;
+	return strtobool(buf, &hugetlb_free_vmemmap_enabled);
 }
 early_param("hugetlb_free_vmemmap", early_hugetlb_free_vmemmap_param);
 
diff --git a/mm/page_table_check.c b/mm/page_table_check.c
index 3763bd077861a..2458281bff893 100644
--- a/mm/page_table_check.c
+++ b/mm/page_table_check.c
@@ -23,15 +23,7 @@ EXPORT_SYMBOL(page_table_check_disabled);
 
 static int __init early_page_table_check_param(char *buf)
 {
-	if (!buf)
-		return -EINVAL;
-
-	if (strcmp(buf, "on") == 0)
-		__page_table_check_enabled = true;
-	else if (strcmp(buf, "off") == 0)
-		__page_table_check_enabled = false;
-
-	return 0;
+	return strtobool(buf, &__page_table_check_enabled);
 }
 
 early_param("page_table_check", early_page_table_check_param);
-- 
2.35.1