[PATCH bpf-next] net-veth: add type safety to veth_xdp_to_ptr() and veth_ptr_to_xdp()

From: "Maciej Żenczykowski" <zenczykowski@gmail.com>
To: "Maciej Żenczykowski" <maze@google.com>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>
Cc: Linux Network Development Mailing List <netdev@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	BPF Mailing List <bpf@vger.kernel.org>,
	"David S . Miller" <davem@davemloft.net>
Subject: [PATCH bpf-next] net-veth: add type safety to veth_xdp_to_ptr() and veth_ptr_to_xdp()
Date: Tue, 18 Aug 2020 19:00:27 -0700	[thread overview]
Message-ID: <20200819020027.4072288-1-zenczykowski@gmail.com> (raw)

From: Maciej Żenczykowski <maze@google.com>

This reduces likelihood of incorrect use.

Test: builds
Signed-off-by: Maciej Żenczykowski <maze@google.com>
---
 drivers/net/veth.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index e56cd562a664..b80cbffeb88e 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -234,14 +234,14 @@ static bool veth_is_xdp_frame(void *ptr)
 	return (unsigned long)ptr & VETH_XDP_FLAG;
 }
 
-static void *veth_ptr_to_xdp(void *ptr)
+static struct xdp_frame *veth_ptr_to_xdp(void *ptr)
 {
 	return (void *)((unsigned long)ptr & ~VETH_XDP_FLAG);
 }
 
-static void *veth_xdp_to_ptr(void *ptr)
+static void *veth_xdp_to_ptr(struct xdp_frame *xdp)
 {
-	return (void *)((unsigned long)ptr | VETH_XDP_FLAG);
+	return (void *)((unsigned long)xdp | VETH_XDP_FLAG);
 }
 
 static void veth_ptr_free(void *ptr)
-- 
2.28.0.220.ged08abb693-goog

