From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C1ADC35DF5 for ; Tue, 25 Feb 2020 12:50:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F62620726 for ; Tue, 25 Feb 2020 12:50:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="tCh9n7eE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730395AbgBYMur (ORCPT ); Tue, 25 Feb 2020 07:50:47 -0500 Received: from merlin.infradead.org ([205.233.59.134]:42098 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730001AbgBYMup (ORCPT ); Tue, 25 Feb 2020 07:50:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=g+KiJZzksPAm2BNWFU7kxrgNyJwR+BQ4nqNwddviLwE=; b=tCh9n7eE375VlDUXXbMfRxeU5t BODlcDvyopq6h4o8ADOabjBwl7+bM+eJDXxDiW9VvedM9hC+hhDR8qYMl1keKDi8aOxnDPSuF27NY GznS6JGLmDAD4U6yc24GcNOVuHXJNnD6QVRG3qjsXUvqJRiP3rwffnHdw1Pzmw+UOL85eLw2Hq2pe jUPVZNiuXo6YJF4MYXEW3LPe69DbOgp9BaXmtG4iNTEeuyj5bH06fMKY9d0McLrhyQmm6L5Kx9JLE 236w/SOd0/8NpFPIdNFW0/QT3n1qTaGPpIS1yhp3cfb2rJDtzjegTQdk9w1J7WO7WIuvrcpsiXzDM xsLsJHvw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1j6ZfW-0003gq-6w; Tue, 25 Feb 2020 12:50:34 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 67198306060; Tue, 25 Feb 2020 13:48:35 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 2FDD82B4DAAF6; Tue, 25 Feb 2020 13:50:30 +0100 (CET) Date: Tue, 25 Feb 2020 13:50:30 +0100 From: Peter Zijlstra To: Andy Shevchenko Cc: Jesse Brandeburg , tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, linux-kernel@vger.kernel.org, linux@rasmusvillemoes.dk, dan.j.williams@intel.com Subject: Re: [PATCH v5 1/2] x86: fix bitops.h warning with a moved cast Message-ID: <20200225125030.GL18400@hirez.programming.kicks-ass.net> References: <20200224225020.2212544-1-jesse.brandeburg@intel.com> <20200225103050.GD10400@smile.fi.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200225103050.GD10400@smile.fi.intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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