linux-kernel - [PATCH] include/linux/mm: Initialize an int variable to prevent returning garbage value

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Date:   Tue, 24 May 2022 10:27:55 -0700
From:   Gautam Menghani <gautammenghani201@...il.com>
To:     akpm@...ux-foundation.org
Cc:     Gautam Menghani <gautammenghani201@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        skhan@...uxfoundation.org
Subject: [PATCH] include/linux/mm: Initialize an int variable to prevent returning garbage value

Initialize the variable 'ret' to prevent garbage value from being
returned. This Fixes the clang scan warning: Undefined or garbage value
returned to caller [core.uninitialized.UndefReturn]
        return ret;

Signed-off-by: Gautam Menghani <gautammenghani201@...il.com>
---
 include/linux/mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9f44254af8ce..f437bd81d6a4 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1700,7 +1700,7 @@ static inline int arch_make_page_accessible(struct page *page)
 #ifndef HAVE_ARCH_MAKE_FOLIO_ACCESSIBLE
 static inline int arch_make_folio_accessible(struct folio *folio)
 {
-	int ret;
+	int ret = 0;
 	long i, nr = folio_nr_pages(folio);
 
 	for (i = 0; i < nr; i++) {
-- 
2.25.1