netdev - Re: [Patch net-next v5] netpoll: fix some sparse warnings in various places

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Message-ID: <20130218170126.GA1576@minipsycho.orion>
Date:	Mon, 18 Feb 2013 18:01:26 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Cong Wang <amwang@...hat.com>
Cc:	netdev@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>,
	Vlad Yasevich <vyasevic@...hat.com>,
	Stephen Hemminger <stephen@...workplumber.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [Patch net-next v5] netpoll: fix some sparse warnings in various
 places

Mon, Feb 18, 2013 at 04:22:29AM CET, amwang@...hat.com wrote:
>From: Cong Wang <amwang@...hat.com>
>
>This fixes sparse warnings like the one below:
>
>drivers/net/team/team.c:953:25: warning: incorrect type in return expression (different address spaces)
>drivers/net/team/team.c:953:25:    expected struct netpoll_info *
>drivers/net/team/team.c:953:25:    got struct netpoll_info [noderef] <asn:4>*npinfo
>
>and make these functions return bool as suggested by Jiri.
>
>Cc: Eric Dumazet <eric.dumazet@...il.com>
>Cc: Jiri Pirko <jiri@...nulli.us>
>Cc: Vlad Yasevich <vyasevic@...hat.com>
>Cc: Stephen Hemminger <stephen@...workplumber.org>
>Cc: David S. Miller <davem@...emloft.net>
>Signed-off-by: Cong Wang <amwang@...hat.com>
>
>---
>diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
>index 94c1534..2263bf2 100644
>--- a/drivers/net/bonding/bond_main.c
>+++ b/drivers/net/bonding/bond_main.c
>@@ -1300,9 +1300,9 @@ static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni, g
> 	return err;
> }
> 
>-static struct netpoll_info *bond_netpoll_info(struct bonding *bond)
>+static bool bond_netpoll_info(struct bonding *bond)
> {
>-	return bond->dev->npinfo;
>+	return rcu_access_pointer(bond->dev->npinfo) != NULL;
                                                    ^^^^^^^^
						    this is not necessary
						    (sorry for nitpick)
--
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