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Date:   Wed, 11 Jul 2018 03:41:35 +0100
From:   Al Viro <viro@ZenIV.linux.org.uk>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Miklos Szeredi <mszeredi@redhat.com>
Subject: Re: [RFC][PATCH 08/42] make sure do_dentry_open() won't return
 positive as an error
Message-ID: <20180711024135.GO30522@ZenIV.linux.org.uk>
References: <20180711021136.GN30522@ZenIV.linux.org.uk>
 <20180711022206.12571-1-viro@ZenIV.linux.org.uk>
 <20180711022206.12571-8-viro@ZenIV.linux.org.uk>
 <CA+55aFzcXNLZ7__OCWDwkDgeQuC=kxzxVW-CYJ-T3MwhtXed+Q@mail.gmail.com>
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On Tue, Jul 10, 2018 at 07:39:07PM -0700, Linus Torvalds wrote:
> On Tue, Jul 10, 2018 at 7:23 PM Al Viro <viro@zeniv.linux.org.uk> wrote:
> >
> >
> >  cleanup_all:
> > +       if (unlikely(error > 0)) {
> > +               WARN_ON(1);
> > +               error = -EINVAL;
> > +       }
> 
> Can we please do this as
> 
>         if (WARN_ON_ONCE(error > 0))
>                 error = -EINVAL;
> 
> 
> instead?
> 
> That already should do the unlikely for you, and *if* somebody can
> trigger this, at least they won't be spamming the logs and making a
> mess. A single warning is fine.

No problem, will do...