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From:   John Hubbard <jhubbard@nvidia.com>
To:     Andrew Morton <akpm@linux-foundation.org>
CC:     David Hildenbrand <david@redhat.com>, Peter Xu <peterx@redhat.com>,
        "Shuah Khan" <shuah@kernel.org>,
        Nathan Chancellor <nathan@kernel.org>, <linux-mm@kvack.org>,
        <linux-kselftest@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        John Hubbard <jhubbard@nvidia.com>
Subject: [PATCH 02/12] selftests/mm: fix unused variable warning in hugetlb-madvise.c
Date:   Thu, 1 Jun 2023 18:33:48 -0700
Message-ID: <20230602013358.900637-3-jhubbard@nvidia.com>
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The dummy variable is required in order to make this work, so declare it
as volatile in order to avoid the clang compiler warning.

Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 tools/testing/selftests/mm/hugetlb-madvise.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
index 28426e30d9bc..3296ccaf7525 100644
--- a/tools/testing/selftests/mm/hugetlb-madvise.c
+++ b/tools/testing/selftests/mm/hugetlb-madvise.c
@@ -65,7 +65,7 @@ void write_fault_pages(void *addr, unsigned long nr_pages)
 
 void read_fault_pages(void *addr, unsigned long nr_pages)
 {
-	unsigned long dummy = 0;
+	volatile unsigned long dummy = 0;
 	unsigned long i;
 
 	for (i = 0; i < nr_pages; i++)
-- 
2.40.1