linux-kernel - Re: [PATCH] staging: sm750fb: always take the lock

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Date:   Mon, 26 Jun 2017 11:19:27 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Frans Klaver <fransklaver@...il.com>
Cc:     AbdAllah-MEZITI <abdallah.meziti.pro@...il.com>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Teddy Wang <teddy.wang@...iconmotion.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
        driverdevel <devel@...verdev.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: sm750fb: always take the lock

On Mon, Jun 26, 2017 at 11:16 AM, Frans Klaver <fransklaver@...il.com> wrote:
> On Mon, Jun 26, 2017 at 11:11 AM, Geert Uytterhoeven
> <geert@...ux-m68k.org> wrote:
>> On Mon, Jun 26, 2017 at 7:45 AM, AbdAllah-MEZITI
>> <abdallah.meziti.pro@...il.com> wrote:
>>> This patch
>>> - will always take the lock
>>
>> Why?
>>
>> "The current code only takes the lock if multiple instances are in use.
>>  This is error-prone, and confuses static analyzers.
>>  As taking the lock in case of a single instance is harmful and cheap,
>>  change the code to always take the lock."
>
> I would argue that it's not harmful, lest people get confused about

Sorry, I meant "harmless". I should start caring as much for commit
messages I write for other people as for those I write for myself ;-)

> it. And I agree that this explanation is much more useful than just
> mentioning the warnings that you saw.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds