linux-kernel - Re: [PATCH v5 1/2] x86: fix bitops.h warning with a moved cast

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Message-ID: <20200225125030.GL18400@hirez.programming.kicks-ass.net>
Date:   Tue, 25 Feb 2020 13:50:30 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
Cc:     Jesse Brandeburg <jesse.brandeburg@...el.com>, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        linux-kernel@...r.kernel.org, linux@...musvillemoes.dk,
        dan.j.williams@...el.com
Subject: Re: [PATCH v5 1/2] x86: fix bitops.h warning with a moved cast

On Tue, Feb 25, 2020 at 12:30:50PM +0200, Andy Shevchenko wrote:

> I think it is a C standard which dictates this, compiler just follows.

Correct, a semi readable explanation of this:

  https://stackoverflow.com/questions/46073295/implicit-type-promotion-rules