linux-kernel - Re: linux-next: build warning after merge of the akpm-current tree

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190801061527.GB11627@dhcp22.suse.cz>
Date:   Thu, 1 Aug 2019 08:15:28 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Miles Chen <miles.chen@...iatek.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Qian Cai <cai@....pw>
Subject: Re: linux-next: build warning after merge of the akpm-current tree

On Thu 01-08-19 15:51:30, Stephen Rothwell wrote:
> Hi Miles,
> 
> On Wed, 31 Jul 2019 14:28:04 +0800 Miles Chen <miles.chen@...iatek.com> wrote:
> >
> > On Wed, 2019-07-31 at 16:11 +1000, Stephen Rothwell wrote:
> > > 
> > > After merging the akpm-current tree, today's linux-next build (powerpc
> > > ppc64_defconfig) produced this warning:
> > > 
> > > mm/memcontrol.c: In function 'invalidate_reclaim_iterators':
> > > mm/memcontrol.c:1160:11: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
> > >   } while (memcg = parent_mem_cgroup(memcg));
> > >            ^~~~~
> > >   
> > 
> > Hi Stephen,
> > 
> > Thanks for the telling me this. Sorry for the build warning. 
> > Should I send patch v5 to the mailing list to fix this? 
> 
> You might as well (cc'ing Andrew, of course).
> 
> I would suggest finishing that loop like this:
> 
> 		memcg = parent_mem_cgroup(memcg);
> 	} while (memcg);
> 
> rather than adding a set of parentheses.

Qian has already posted a patch http://lkml.kernel.org/r/1564580753-17531-1-git-send-email-cai@lca.pw
-- 
Michal Hocko
SUSE Labs