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

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Message-Id: <200610042133.k94LXkDq016761@olwen.urbana.css.mot.com>
Date:	Wed, 4 Oct 2006 16:33:46 -0500 (CDT)
From:	"Scott E. Preece" <preece@...orola.com>
To:	pavel@....cz
CC:	shd@...alwe.fi, 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


| From: Pavel Machek<pavel@....cz>
| 
| Hi!
| 
| > | > > > +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.
| > ---
| > 
| > True, but a good compiler should remove the dead initialization...
| 
| True, but efficient code is only one of constraints. Code should be
| easy to read, too.
| 								Pavel
| -- 
| (english) http://www.livejournal.com/~pavelmachek
| (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

[Ironically, I was going to say "I think this dead horse has been
sufficiently beaten, but then I saw the picture reference in Pavel's
signature and decided that would be rude!]

I agree - the initialization is unneeded. However, it's also mostly
harmless...

scott

-- 
scott preece
motorola mobile devices, il67, 1800 s. oak st., champaign, il  61820  
e-mail:	preece@...orola.com	fax:	+1-217-384-8550
phone:	+1-217-384-8589	cell: +1-217-433-6114	pager: 2174336114@...xt.com


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