On Tue, May 28, 2013 at 05:34:53PM -0700, Eric Dumazet wrote:
> On Tue, 2013-05-28 at 13:10 +0400, Roman Gushchin wrote:
> > On 28.05.2013 04:12, Eric Dumazet wrote:
>
> > > Adding a barrier() is probably what we want.
> >
> > I agree, inserting barrier() is also a correct and working fix.
>
> Yeah, but I can not find a clean way to put it inside the "for (;;)"
>
> for (barrier();;) ->
>
> error: expected expression before ‘__asm__’
>
> No user currently does :
>
> if (condition)
> hlist_nulls_for_each_entry_rcu(tpos, pos, head, member)
>
> But who knows...
I still have my earlier question, but I suggest "({ barrier(); XXX })"
to put the barrier into the for loop, either in the second or third
clause, where XXX was the original second or third clause.
Thanx, Paul
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