linux-kernel - [PATCH] selftests/mm: Replace obsolete memalign() with posix

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Date:   Wed, 12 Apr 2023 05:35:20 -0400
From:   Deming Wang <wangdeming@...pur.com>
To:     <akpm@...ux-foundation.org>, <shuah@...nel.org>
CC:     <linux-mm@...ck.org>, <linux-kselftest@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Deming Wang <wangdeming@...pur.com>
Subject: [PATCH] selftests/mm: Replace obsolete memalign() with posix_memalign()

memalign() is obsolete according to its manpage.

Replace memalign() with posix_memalign().

As a pointer is passed into posix_memalign(),initialize *map to
NULL,to silence a warning about the function's return value being
used as uninitialized (which is not valid anyway because the
error is properly checked before p is returned).

Signed-off-by: Deming Wang <wangdeming@...pur.com>
---
 tools/testing/selftests/mm/soft-dirty.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c
index 21d8830c5f24..c99350e110ec 100644
--- a/tools/testing/selftests/mm/soft-dirty.c
+++ b/tools/testing/selftests/mm/soft-dirty.c
@@ -80,9 +80,9 @@ static void test_hugepage(int pagemap_fd, int pagesize)
 	int i, ret;
 	size_t hpage_len = read_pmd_pagesize();
 
-	map = memalign(hpage_len, hpage_len);
-	if (!map)
-		ksft_exit_fail_msg("memalign failed\n");
+	ret = posix_memalign((void **)(&map), hpage_len, hpage_len);
+	if (ret < 0)
+		ksft_exit_fail_msg("posix_memalign failed\n");
 
 	ret = madvise(map, hpage_len, MADV_HUGEPAGE);
 	if (ret)
-- 
2.27.0