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Date: Fri, 5 Jun 2020 16:25:58 +0300
From: Andy Shevchenko <andy.shevchenko@gmail.com>
Subject: Re: [PATCH RESEND] lib: fix bitmap_parse() on 64-bit big endian archs
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To: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, linux-s390@vger.kernel.org, Stable <stable@vger.kernel.org>, Yury Norov <yury.norov@gmail.com>, Amritha Nambiar <amritha.nambiar@intel.com>, Arnaldo Carvalho de Melo <acme@redhat.com>, Chris Wilson <chris@chris-wilson.co.uk>, Kees Cook <keescook@chromium.org>, Matthew Wilcox <willy@infradead.org>, Miklos Szeredi <mszeredi@redhat.com>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Steffen Klassert <steffen.klassert@secunet.com>, "Tobin C . Harding" <tobin@kernel.org>, Vineet Gupta <vineet.gupta1@synopsys.com>, Will Deacon <will.deacon@arm.com>, Willem de Bruijn <willemb@google.com>

On Tue, Jun 02, 2020 at 12:24:31PM +0200, Alexander Gordeev wrote:
> On Mon, May 18, 2020 at 01:50:59PM +0200, Alexander Gordeev wrote:
> > On Mon, May 18, 2020 at 02:33:43PM +0300, Andy Shevchenko wrote:
> > > On Mon, May 18, 2020 at 1:40 PM Alexander Gordeev
> > > <agordeev@linux.ibm.com> wrote:
> > > >
> > > > Commit 2d6261583be0 ("lib: rework bitmap_parse()") does
> > > > not take into account order of halfwords on 64-bit big
> > > > endian architectures.
> > > 
> > > Thanks for report and the patch!
> > > 
> > > Did it work before? Can we have a test case for that that we will see
> > > the failure?
> > 
> > The test exists and enabled with CONFIG_TEST_BITMAP.
> > It does not appear ever passed before on 64 BE.
> > It does not fail on 64 LE for me either.
> 
> Hi Andy et al,
> 
> Any feedback on the fix? Does it work on 64 LE for you?

Test case, please.

Yes, you can simulate BE test case on LE platform and vise versa.

-- 
With Best Regards,
Andy Shevchenko