linux-kernel - Re: [linux-pm] [RFC] OMAP1 PM Core, PM Core Implementation 2/2

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Message-ID: <20061001173252.GB24539@zakalwe.fi>
Date:	Sun, 1 Oct 2006 20:32:52 +0300
From:	Heikki Orsila <shd@...alwe.fi>
To:	Pavel Machek <pavel@....cz>
Cc:	"Eugeny S. Mints" <eugeny.mints@...il.com>,
	linux-pm@...ts.osdl.org, linux-kernel@...r.kernel.org,
	ext-Tuukka.Tikkanen@...ia.com
Subject: Re: [linux-pm] [RFC] OMAP1 PM Core, PM Core  Implementation 2/2

On Sun, Oct 01, 2006 at 07:10:32PM +0200, Pavel Machek wrote:
> On Sun 2006-10-01 18:22:28, Heikki Orsila wrote:
> > Some nitpicking about the patch follows..
> > 
> > On Sat, Sep 30, 2006 at 02:24:35AM +0400, Eugeny S. Mints wrote:
> > > +static long 
> > > +get_vtg(const char *vdomain)
> > > +{
> > > +	long ret = 0;
> > 
> > Unnecessary initialisation.
> 
> No, sorry.

In get_vtg(), if VOLTAGE_FRAMEWORK is defined then

	ret = vtg_get_voltage(v);

is the first user. If VOLTAGE_FRAMEWORK is not defined, the first user is:

	ret = vtg_get_voltage(&vhandle);

Then "return ret;" follows. I cannot see a path where 
pre-initialisation of ret does anything useful. If someone removed the
#else part, the compiler would bark.

> 
> > > +static long 
> > > +set_vtg(const char *vdomain, int val)
> > > +{
> > > +	long ret = 0;
> > 
> > here too.
> 
> Wrong again. automatic variables are not zero initialized.

My bad, this was a mistake. If VOLTAGE_FRAMEWORK is not defined, ret 
must be initialised. (the compiler would have noticed this one :-)

>> 'int i = 0;' happens in many functions.

for example, omap_pm_create_point() does this.

- Heikki
-
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