linux-kernel - [PATCH net-next] tun: add missing rcu annotation

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Date:   Mon, 22 Jan 2018 10:55:38 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jason Wang <jasowang@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH net-next] tun: add missing rcu annotation

This patch fixes the following sparse warnings:

drivers/net/tun.c:2241:15: error: incompatible types in comparison expression (different address spaces)

Fixes: cd5681d7d890 ("tuntap: rename struct tun_steering_prog to struct tun_prog")
Cc: Daniel Borkmann <daniel@...earbox.net>
Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/net/tun.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 6988746..2bc18b1 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2225,7 +2225,8 @@ static void tun_prog_free(struct rcu_head *rcu)
 	kfree(prog);
 }
 
-static int __tun_set_ebpf(struct tun_struct *tun, struct tun_prog **prog_p,
+static int __tun_set_ebpf(struct tun_struct *tun,
+			  struct tun_prog __rcu **prog_p,
 			  struct bpf_prog *prog)
 {
 	struct tun_prog *old, *new = NULL;
-- 
2.7.4