linux-kernel - Re: fs/notify/fanotify/fanotify.c:198:2: note: in expansion of macro 'pr_warn

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Date:   Thu, 14 Mar 2019 13:38:11 +0100
From:   Jan Kara <jack@...e.cz>
To:     Amir Goldstein <amir73il@...il.com>
Cc:     Jan Kara <jack@...e.cz>, kbuild-all@...org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-mips@...r.kernel.org, Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>
Subject: Re: fs/notify/fanotify/fanotify.c:198:2: note: in expansion of macro
 'pr_warn_ratelimited'

On Thu 14-03-19 14:01:18, Amir Goldstein wrote:
> On Thu, Mar 14, 2019 at 10:37 AM Jan Kara <jack@...e.cz> wrote:
> >
> > AFAICS this is the known problem with weird mips definitions of
> > __kernel_fsid_t which uses long whereas all other architectures use int,
> > right? Seeing that mips can actually have 8-byte longs, I guess this
> > bogosity is just wired in the kernel API and we cannot easily fix it in
> > mips (mips guys, correct me if I'm wrong). So what if we just
> > unconditionally typed printed values to unsigned int to silence the
> > warning?
> 
> I don't understand why. To me that sounds like papering over a bug.
> 
> See this reply from mips developer Paul Burton:
> https://marc.info/?l=linux-fsdevel&m=154783680019904&w=2
> mips developers have not replied to the question why __kernel_fsid_t
> should use long.

Ah, right. I've missed that mips defines __kernel_fsid_t only if
sizeof(long) == 4. OK, than fixing MIPS headers is definitely what we ought
to do. Mips guys, any reason why the patch from Ralf didn't get merged yet?

								Honza

-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR