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

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Date:   Wed, 12 Apr 2023 21:17:19 -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] mm: huge_memory: 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memalign() is obsolete according to its manpage.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 *one_page
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 one_page is returned).

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

diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index cbb5e6893cbf..94c7dffc4d7d 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -96,10 +96,10 @@ void split_pmd_thp(void)
 	char *one_page;
 	size_t len = 4 * pmd_pagesize;
 	size_t i;
+	int ret;
 
-	one_page = memalign(pmd_pagesize, len);
-
-	if (!one_page) {
+	ret = posix_memalign((void **)&one_page, pmd_pagesize, len);
+	if (ret < 0) {
 		printf("Fail to allocate memory\n");
 		exit(EXIT_FAILURE);
 	}
-- 
2.27.0