linux-kernel - Re: [PATCH 0/5] add s390 support to nolibc and rcutorture

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Message-ID: <20221210091242.GD21743@1wt.eu>
Date:   Sat, 10 Dec 2022 10:12:42 +0100
From:   Willy Tarreau <w@....eu>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Sven Schnelle <svens@...ux.ibm.com>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] add s390 support to nolibc and rcutorture

On Fri, Dec 09, 2022 at 05:26:43PM -0800, Paul E. McKenney wrote:
> On Fri, Dec 09, 2022 at 04:28:35PM +0100, Willy Tarreau wrote:
> > On Fri, Dec 09, 2022 at 07:03:25AM -0800, Paul E. McKenney wrote:
> > > On Fri, Dec 09, 2022 at 03:19:34PM +0100, Sven Schnelle wrote:
> > > > Hi,
> > > > 
> > > > these patches add support for the s390 architecture both to nolibc
> > > > and rcutorture. Note that this only adds support for the 64 bit
> > > > version, no support for 31 bit (compat) is added. For nolibc it
> > > > includes one bugfix to make the fd_set datatype match the kernel
> > > > type.
> > > 
> > > Nice!!!
> > 
> > indeed :-)
> > 
> > > The rcutorture patches look plausible to me, but I must defer to Willy
> > > Tarreau on the nolibc changes.
> > 
> > I had a very quick glance over them and nothing shocked me. I just want
> > to double-check the u32->long conversion with a careful eye but I'm happy
> > to see that your rcutorture binary continues its diet on more and more
> > architectures ;-)
> 
> Very good, and I will await your review.

So overall the series looks good to me except one occurrence of "s390x"
instead of "s390" in arch.h which will prevent the build from working
with the old "-include nolibc.h" mode. If Sven agrees we can fix it
directly in the patch (drop the 'x' in the "#include") so that he does
not need to respin the series. I'm deferring to you the final word on
the part on rcutorture (but it looks trivially correct to me).

Thanks!
Willy