linux-kernel - Re: [Outreachy kernel] [PATCH] staging: rtl8192u: Remove variable set but not used

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Date:   Mon, 12 Apr 2021 11:31:03 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>
Cc:     Julia Lawall <julia.lawall@...ia.fr>,
        outreachy-kernel@...glegroups.com, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [Outreachy kernel] [PATCH] staging: rtl8192u: Remove variable
 set but not used

On Sun, Apr 11, 2021 at 08:12:05PM +0200, Fabio M. De Francesco wrote:
> On Sunday, April 11, 2021 7:43:57 PM CEST Julia Lawall wrote:
> > On Sun, 11 Apr 2021, Fabio M. De Francesco wrote:
> > > Remove variable "int ret" which is instantiated but not used.
> > 
> > instantiated -> declared?  I thought instantiated could mean initialized,
> > but that doesn't seem to be the case.
> > 
> > julia
> Please, help me to remind...
> 
> If a local variable is declared but not set to any value, does it take 
> space on the stack?

Maybe, maybe not, doesn't matter either way.

> If I understand your message, it does not. Therefore it is only declared 
> but no memory is allocated for it (i.e., it is not instantiated). Right?
> 
> If you confirm I've understood this topic, I can send a v2 patch.

That's not the issue here at all...

confused,

greg k-h