linux-kernel - Re: [2.6.19 PATCH 3/7] ehea: queue management

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Date:	Tue, 22 Aug 2006 15:51:07 +0200
From:	Jan-Bernd Themann <ossthema@...ibm.com>
To:	Arnd Bergmann <arnd.bergmann@...ibm.com>
Cc:	netdev <netdev@...r.kernel.org>,
	Christoph Raisch <raisch@...ibm.com>,
	"Jan-Bernd Themann" <themann@...ibm.com>,
	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"linux-ppc" <linuxppc-dev@...abs.org>,
	Marcus Eder <meder@...ibm.com>,
	Thomas Klein <tklein@...ibm.com>
Subject: Re: [2.6.19 PATCH 3/7] ehea: queue management

Hi,

On Tuesday 22 August 2006 16:01, Arnd Bergmann wrote:
> > +       u64 rpage = 0;
> > +       int ret;
> > +       int cnt = 0;
> > +       void *vpage = NULL;
> > +
> > +       ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
> > +       if (ret)
> > +               return ret;
> > +
> > +       for (cnt = 0; cnt < nr_pages; cnt++) {
> > +               vpage = hw_qpageit_get_inc(hw_queue);
> > +               if (!vpage) {
> > +                       ehea_error("hw_qpageit_get_inc failed");
> > +                       goto qp_alloc_register_exit0;
> > +               }
> > +               rpage = virt_to_abs(vpage);
> 
> As someone mentioned before, the initialization to 0 or NULL
> is pointless here, as the variables are always assigned before
> they are used. There are a number of other places in your
> code that do similar things, you should probably go through
> these and remove the initializers.
> 
> If you indeed need something to be initialized, it is good practice
> to do the initialization as late as possible, e.g.
> 
> 	int foo;
> 	...
> 	foo = 0;
> 	do_foo(foo);
> 
> to make it clear that you have a reason to initialize it.
> 
> 	Arnd <><
> 

Agreed. We started to remove some but apparrently not all.
We'll go through the code and remove them where possible.

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