linux-kernel - Re: [PATCH] gpio: of: Optimize quirk checks

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Message-ID: <CACRpkdY2G6xJf7WbraXvH0p2Rp=FVJxnsnJBCzCpZZmPag5bNw@mail.gmail.com>
Date:   Mon, 8 Apr 2019 13:04:27 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: of: Optimize quirk checks

On Fri, Mar 29, 2019 at 9:42 AM Geert Uytterhoeven
<geert+renesas@...der.be> wrote:

> Simple string comparisons are cheaper than DT lookups, as the latter
> involve taking a spinlock and traversing properties.
> Hence optimize quirk checks by postponing DT lookups after string
> comparisons.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>

Thanks Geert! I merged v5.1-rc3 into my devel branch and
applied this on top.

Yours,
Linus Walleij