netdev - Re: [PATCH net-next] net: relax rtnl

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20101005.002959.45905767.davem@davemloft.net>
Date:	Tue, 05 Oct 2010 00:29:59 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	hadi@...erus.ca, netdev@...r.kernel.org, jarkao2@...il.com
Subject: Re: [PATCH net-next] net: relax rtnl_dereference()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 04 Oct 2010 11:00:12 +0200

> Le lundi 04 octobre 2010 à 10:42 +0200, Eric Dumazet a écrit :
> 
>> BTW, rtnl_dereference() should be changed to use
>> rcu_dereference_protected() instead of rcu_dereference_check() :
>> If RTBL is held, there is no need to force a barrier.
>> 
> 
> [PATCH net-next] net: relax rtnl_dereference()
> 
> rtnl_dereference() is used in contexts where RTNL is held, to fetch an
> RCU protected pointer.
>  
> Updates to this pointer are prevented by RTNL, so we dont need
> smp_read_barrier_depends() and the ACCESS_ONCE() provided in
> rcu_dereference_check().
> 
> rtnl_dereference() is mainly a macro to document the locking invariant.
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html