netdev - Re: [PATCH net] ip_tunnel: fix preempt warning in ip tunnel creation/updating

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Message-ID: <1461852676.4802.31.camel@redhat.com>
Date:	Thu, 28 Apr 2016 16:11:16 +0200
From:	Paolo Abeni <pabeni@...hat.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>, tgraf@...g.ch,
	pshelar@...ira.com, jbenc@...hat.com, hannes@...essinduktion.org,
	sergei.shtylyov@...entembedded.com,
	Tom Herbert <tom@...bertland.com>
Subject: Re: [PATCH net] ip_tunnel: fix preempt warning in ip tunnel
 creation/updating

On Thu, 2016-04-28 at 05:09 -0700, Eric Dumazet wrote:
> On Thu, 2016-04-28 at 11:04 +0200, Paolo Abeni wrote:
> > After the commit e09acddf873b ("ip_tunnel: replace dst_cache with generic
> > implementation"), a preemption debug warning is triggered on ip4
> > tunnels updating; the dst cache helper needs to be invoked in unpreemptible
> > context.
> > 
> > We don't need to load the cache on tunnel update, so this commit fixes
> > the warning replacing the load with a dst cache reset, which is
> > preempt safe.
> > 
> > Fixes: e09acddf873b ("ip_tunnel: replace dst_cache with generic
> > implementation")
> > 
> > Reported-by: Eric Dumazet <eric.dumazet@...il.com>
> > Signed-off-by: Paolo Abeni <pabeni@...hat.com>
> > ---
> 
> Seems good to me, thanks.
> 
> Note that the Fixes: tag should not be followed by a blank line.
> (And presumably no line wrap is necessary)
> It really is part of the standard set of tags.
> They should be grouped together.

Oops, I missed that points and checkpatch.pl did not help. 
Thank you for the advice.

Paolo