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Date:   Fri, 31 Jul 2020 17:18:17 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net-next] tun: add missing rcu annotation in

From: Jason Wang <>
Date: Fri, 31 Jul 2020 00:17:20 -0400

> We expecte prog_p to be protected by rcu, so adding the rcu annotation
> to fix the following sparse warning:
> drivers/net/tun.c:3003:36: warning: incorrect type in argument 2 (different address spaces)
> drivers/net/tun.c:3003:36:    expected struct tun_prog [noderef] __rcu **prog_p
> drivers/net/tun.c:3003:36:    got struct tun_prog **prog_p
> drivers/net/tun.c:3292:42: warning: incorrect type in argument 2 (different address spaces)
> drivers/net/tun.c:3292:42:    expected struct tun_prog **prog_p
> drivers/net/tun.c:3292:42:    got struct tun_prog [noderef] __rcu **
> drivers/net/tun.c:3296:42: warning: incorrect type in argument 2 (different address spaces)
> drivers/net/tun.c:3296:42:    expected struct tun_prog **prog_p
> drivers/net/tun.c:3296:42:    got struct tun_prog [noderef] __rcu **
> Reported-by: Michael S. Tsirkin <>
> Signed-off-by: Jason Wang <>

Applied, thanks.

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