linux-kernel - Re: [PATCH] kernel.h: fix new warnings for container

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Message-ID: <CAK8P3a3aXROa=05SCS15M+-UNdzFdOwNjP2qHu=pJjqVuTpP7w@mail.gmail.com>
Date:   Wed, 21 Jun 2017 12:15:50 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Ian Abbott <abbotti@....co.uk>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Nazarewicz <mina86@...a86.com>,
        Kees Cook <keescook@...omium.org>,
        Borislav Petkov <bp@...e.de>,
        Johannes Berg <johannes.berg@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexander Potapenko <glider@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kernel.h: fix new warnings for container_of()

On Wed, Jun 21, 2017 at 11:25 AM, Ian Abbott <abbotti@....co.uk> wrote:
> On 20/06/17 21:09, Arnd Bergmann wrote:
>>
>> I see new warnings with gcc-7.0.1 with the modified container_of():
>>
>> fs/f2fs/dir.c: In function 'F2FS_I':
>> fs/f2fs/f2fs.h:1122:385: note: found mismatched ssa struct pointer types:
>> 'struct f2fs_inode_info' and 'struct inode'
>
>
> Is that actually a warning, or just informational?  In any case, it seems
> like a good idea to avoid it.

It's informational, not a warning. I couldn't actually figure out what the
message is trying to tell me here. Maybe the message could also be
improved?

      Arnd