[PATCH] tools/virtio/ringtest: Replace obsolete memalign() with posix_memalign()

[Deming Wang]

memalign() is obsolete according to its manpage.

Replace memalign() with posix_memalign() and remove malloc.h include
that was there for memalign().

As a pointer is passed into posix_memalign(), initialize *p 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@xxxxxxxxxx>
---
 tools/virtio/ringtest/ptr_ring.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/virtio/ringtest/ptr_ring.c b/tools/virtio/ringtest/ptr_ring.c
index c9b26335f891..a0bf4978eace 100644
--- a/tools/virtio/ringtest/ptr_ring.c
+++ b/tools/virtio/ringtest/ptr_ring.c
@@ -26,9 +26,12 @@ typedef int gfp_t;
 
 static void *kmalloc(unsigned size, gfp_t gfp)
 {
-	void *p = memalign(64, size);
-	if (!p)
-		return p;
+	void *p;
+	int ret;
+
+	ret = posix_memalign(&p, 64, size)
+	if (ret < 0)
+		return NULL;
 
 	if (gfp & __GFP_ZERO)
 		memset(p, 0, size);
-- 
2.27.0