From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lee Jones <lee.jones@linaro.org>
Date: Mon, 14 Oct 2019 07:27:34 +0000
Subject: Re: [PATCH v2 3/4] backlight: pwm_bl: drop use of int_pow()
Message-Id: <20191014072734.GG4545@dell>
List-Id: <linux-fbdev.vger.kernel.org>
References: <20191008120327.24208-1-linux@rasmusvillemoes.dk>
 <20191008120327.24208-4-linux@rasmusvillemoes.dk>
In-Reply-To: <20191008120327.24208-4-linux@rasmusvillemoes.dk>
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Thierry Reding <thierry.reding@gmail.com>, Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= <u.kleine-koenig@pengutronix.de>, Daniel Thompson <daniel.thompson@linaro.org>, Jingoo Han <jingoohan1@gmail.com>, Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>, linux-pwm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org

On Tue, 08 Oct 2019, Rasmus Villemoes wrote:

> For a fixed small exponent of 3, it is more efficient to simply use
> two explicit multiplications rather than calling the int_pow() library
> function: Aside from the function call overhead, its implementation
> using repeated squaring means it ends up doing four 64x64
> multiplications.
> 
> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> ---
>  drivers/video/backlight/pwm_bl.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog