linux-kernel - Re: [PATCH 2/2] staging: android: binder: use stack for locally used variable

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Message-ID: <CAEjAshp__=_+zN-PoLE=LxOAvtmZ=czOMGXk6XO+03vPnEJ92Q@mail.gmail.com>
Date:	Wed, 19 Feb 2014 09:31:23 +0900
From:	SeongJae Park <sj38.park@...il.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	devel@...verdev.osuosl.org, Brian Swetland <swetland@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] staging: android: binder: use stack for locally used variable

Hello,

On Wed, Feb 19, 2014 at 2:07 AM, Greg KH <gregkh@...uxfoundation.org> wrote:
> On Tue, Feb 18, 2014 at 08:23:26PM +0900, SeongJae Park wrote:
>> The variable `binder_debugfs_dir_entry_root` is declared as static
>> global variable although it is accessed from init function only. Declare
>> it as init function's local variable because it would be better to read
>> and memory efficiency.
>
> Are you sure?  You now just lost that pointer and it can never be freed.

Oops, you are right.

>
> Not that it ever was, but before it was obvious as to what would need to
> be done if the module could ever be made to be unloaded...
>
> As it is, this code is fine, I can't take this patch.

I agree. Thank you.

>
> greg k-h
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