From mboxrd@z Thu Jan  1 00:00:00 1970
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Subject: Re: [PATCH v3 13/13] mmc: mmci: Add Qcom specific pio_read function.
Date: Wed, 28 May 2014 09:51:59 +0100
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To: Linus Walleij <linus.walleij@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>, Ulf Hansson <ulf.hansson@linaro.org>, "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>, Chris Ball <chris@printf.net>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>
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On 28/05/14 09:08, Linus Walleij wrote:
> On Fri, May 23, 2014 at 2:53 PM,  <srinivas.kandagatla@linaro.org> wrote:
>
>> +       if (unlikely(bytes)) {
>> +               unsigned char buf[4];
> (...)

>
> Please think twice about this.
> http://lwn.net/Articles/70473/
> http://lwn.net/Articles/420019/
> http://lwn.net/Articles/182369/
>
Thanks for the warning.

You are right. I think having likely/unlikely is not always right here.

thanks,
srini
> Yours,
> Linus Walleij
>