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SubjectRe: [PATCH tip/core/rcu 28/48] net: Make accesses to ->br_port safe for sparse RCU
On Tue, May 04, 2010 at 11:41:49PM +0200, Arnd Bergmann wrote:
> On Tuesday 04 May 2010 23:26:31 Stephen Hemminger wrote:
> > > The new versions of the rcu_dereference() APIs requires that any pointers
> > > passed to one of these APIs be fully defined. The ->br_port field
> > > in struct net_device points to a struct net_bridge_port, which is an
> > > incomplete type. This commit therefore changes ->br_port to be a void*,
> > > and introduces a br_port() helper function to convert the type to struct
> > > net_bridge_port, and applies this new helper function where required.
> >
> > I would rather make the bridge hook generic and not take a type argument.
>
> Not sure if you were confused by the comment in the same way that I was.
>
> The bridge hook is not impacted by this at all, since we can either pass
> a void* or a struct net_bridge_port* to it. The br_port() helper
> is used for all the places where we actually want to dereference
> dev->br_port and access its contents.

What should I change in the commit message to clear this up?

Of course, if the code needs to change, please let me know what should
change there as well.

Thanx, Paul


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