linux-kernel - Re: [PATCH] drivers: pnp: proc.c: Removed unnecessary varibles

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Date:   Mon, 26 Apr 2021 15:50:39 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        Anupama K Patil <anupamakpatil123@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Adam <developer@...sty.dev>, bkkarthik@...u.pes.edu,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        kernelnewbies@...nelnewbies.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH] drivers: pnp: proc.c: Removed unnecessary varibles

On Mon, Apr 26, 2021 at 02:00:58PM +0200, Rafael J. Wysocki wrote:
> On Mon, Apr 26, 2021 at 6:57 AM Leon Romanovsky <leon@...nel.org> wrote:
> >
> > On Fri, Apr 23, 2021 at 03:08:03PM -0600, Shuah Khan wrote:
> > > On 4/22/21 12:03 PM, Anupama K Patil wrote:
> > > > de, e are two variables of the type 'struct proc_dir_entry'
> > > > which can be removed to save memory. This also fixes a coding style
> > > > issue reported by checkpatch where we are suggested to make assignment
> > > > outside the if statement.
> > > >
> > >
> > > Sounds like a reasonable change.
> >
> > It is unclear how much changes to ISA code are welcomed.
> 
> Real fixes and obvious cleanups are, not much more than that.

While first part is easy to determine, the second one is more blurry.

> 
> > According to the Wikipedia, even Windows Vista disabled ISA PnP by default.
> > https://en.wikipedia.org/wiki/Legacy_Plug_and_Play#Specifications
> 
> It is indeed unclear how many systems with this interface still run
> Linux, but as long as the code is in the tree, there's nothing wrong
> with attempting to improve it.  There's no assurance that all such
> patches will be applied, though.
> 
> Thanks!