From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1756203AbeDZMue (ORCPT <rfc822;w@1wt.eu>);
        Thu, 26 Apr 2018 08:50:34 -0400
Received: from Galois.linutronix.de ([146.0.238.70]:47524 "EHLO
        Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1755542AbeDZMu3 (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 26 Apr 2018 08:50:29 -0400
Date: Thu, 26 Apr 2018 14:50:25 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: Jiri Kosina <jikos@kernel.org>
cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        "Kirill A. Shutemov" <kirill@shutemov.name>,
        Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org,
        x86@kernel.org
Subject: Re: [PATCH] x86/mm: vmemmap and vmalloc base addressess are usngined
 longs
In-Reply-To: <nycvar.YFH.7.76.1804261415360.28147@cbobk.fhfr.pm>
Message-ID: <alpine.DEB.2.21.1804261450020.1584@nanos.tec.linutronix.de>
References: <nycvar.YFH.7.76.1804121437350.28129@cbobk.fhfr.pm> <20180412142801.oi7bzju3frgkdskp@node.shutemov.name> <nycvar.YFH.7.76.1804161133500.28129@cbobk.fhfr.pm> <20180416094603.fj3wevho5j7wy7s6@black.fi.intel.com>
 <nycvar.YFH.7.76.1804261415360.28147@cbobk.fhfr.pm>
User-Agent: Alpine 2.21 (DEB 202 2017-01-01)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu, 26 Apr 2018, Jiri Kosina wrote:
> On Mon, 16 Apr 2018, Kirill A. Shutemov wrote:
> 
> > > > > Commits 9b46a051e4 ("x86/mm: Initialize vmemmap_base at boot-time") and 
> > > > > a7412546d8 ("x86/mm: Adjust vmalloc base and size at boot-time") lost the 
> > > > > type information for __VMALLOC_BASE_L4, __VMALLOC_BASE_L5, 
> > > > > __VMEMMAP_BASE_L4 and __VMEMMAP_BASE_L5 constants.
> > > > > 
> > > > > Let's declare them explicitly unsigned long again.
> > > > 
> > > > It is just cosmetics, right? I mean these literals are 'unsigned long'
> > > > anyway.
> > > 
> > > Yeah, I can't imagine this particular case leading to any overflow 
> > > scenario, as the literal is big enough to be automatically treated as 
> > > unsigned long by the compiler, but it shuts up sparse which treats this as 
> > > a generic case (where the missing UL might be a problem), and totally 
> > > pollutes the build output.
> > > 
> > > Either we put the 'UL' there, or teach sparse about figuring out the 
> > > 'closer bigger fitting type' for hexadecimal literals, which might be more 
> > > tricky.
> > 
> > I don't have a problem with the patch:
> > 
> > Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> 
> ping, please?
> 
> sparse build is still noisy like hell :/

/me goes to dig it out in the pile ....