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From: Crt Mori <cmo@melexis.com>
Date: Tue, 19 Dec 2017 14:54:59 +0100
Message-ID: <CAKv63usxFaYET4odT6p07zhXxZ6qwxM6=d7+Ms6z04vjX3p3WQ@mail.gmail.com>
Subject: Re: [PATCH v6 1/3] lib: Add strongly typed 64bit int_sqrt
To: Peter Zijlstra <peterz@infradead.org>
Cc: Jonathan Cameron <jic23@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Kees Cook <keescook@chromium.org>,
        Rusty Russell <rusty@rustcorp.com.au>, Ian Abbott <abbotti@mev.co.uk>,
        Larry Finger <Larry.Finger@lwfinger.net>,
        Niklas Soderlund <niklas.soderlund+renesas@ragnatech.se>,
        Thomas Gleixner <tglx@linutronix.de>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        linux-kernel@vger.kernel.org, Linux Iio <linux-iio@vger.kernel.org>
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On 19 December 2017 at 14:25, Peter Zijlstra <peterz@infradead.org> wrote:
> On Tue, Dec 19, 2017 at 10:31:18AM +0100, Crt Mori wrote:
>> IIO kernel does not have the recent version in, so thanks for heads
>
> IIO?
>

Industrial Input / Output Subsytem tree

>> up. It does not change much for my function.
>
> The comment says:
>
>  * Computes: floor(sqrt(x))
>
> floor(sqrt(2^64-1)) == 2^32-1
>

OK, so return value should be u32.