On Fri, 17 Feb 2012 10:45:44 -0800
Joe Perches <joe@xxxxxxxxxxx> wrote:
> On Fri, 2012-02-17 at 07:30 -0800, Luis Felipe Strano Moraes wrote:
> > These are mostly minor changes and they are being sent as one patch only in
> > order to cause the smallest amount of disruption.
> []
> > diff --git a/net/wireless/core.c b/net/wireless/core.c
> []
> > @@ -668,7 +668,7 @@ void wiphy_unregister(struct wiphy *wiphy)
> > mutex_lock(&rdev->devlist_mtx);
> > __count = rdev->opencount;
> > mutex_unlock(&rdev->devlist_mtx);
> > - __count == 0;}));
> > + __count == 0; }));
>
> Inline statement expressions are pretty unusual
> for kernel sources. Normally these are used via
> macro.
>
> I'd try to make the statement expression visually
> distinct. Something like:
>
> wait_event(rdev->dev_wait,
> ({
> int __count;
> mutex_lock(&rdev->devlist_mtx);
> __count = rdev->opencount;
> mutex_unlock(&rdev->devlist_mtx);
> __count == 0;
> })
> );
>
I prefer to see this done as an inline function
wait_event(rdev->dev_wait, is_foo_ready(rdev))
Also, in this case wrapping a condition with a mutex really is
meaningless because the state is longer protected out side the
protected region; in other words the mutex here is bogus and
provides no additional protection.
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