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Message-Id: <20240416162658.3353622-1-usama.anjum@collabora.com>
Date: Tue, 16 Apr 2024 21:26:58 +0500
From: Muhammad Usama Anjum <usama.anjum@...labora.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
Shuah Khan <shuah@...nel.org>,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Bill Wendling <morbo@...gle.com>,
Justin Stitt <justinstitt@...gle.com>,
Zi Yan <ziy@...dia.com>
Cc: Muhammad Usama Anjum <usama.anjum@...labora.com>,
kernel@...labora.com,
linux-mm@...ck.org,
linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org,
llvm@...ts.linux.dev
Subject: [PATCH] selftests: mm: fix unused and uninitialized variable warning
Fix the warnings by initializing and marking the variable as unused.
I've caught the warnings by using clang.
split_huge_page_test.c:303:6: warning: variable 'dummy' set but not used [-Wunused-but-set-variable]
303 | int dummy;
| ^
split_huge_page_test.c:343:3: warning: variable 'dummy' is uninitialized when used here [-Wuninitialized]
343 | dummy += *(*addr + i);
| ^~~~~
split_huge_page_test.c:303:11: note: initialize the variable 'dummy' to silence this warning
303 | int dummy;
| ^
| = 0
2 warnings generated.
Fixes: fc4d182316bd ("mm: huge_memory: enable debugfs to split huge pages to any order")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
---
tools/testing/selftests/mm/split_huge_page_test.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index 6c988bd2f3356..d3c7f5fb3e7b7 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -300,7 +300,7 @@ int create_pagecache_thp_and_fd(const char *testfile, size_t fd_size, int *fd,
char **addr)
{
size_t i;
- int dummy;
+ int __attribute__((unused)) dummy = 0;
srand(time(NULL));
--
2.39.2
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