Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Wed, 21 Apr 2021 21:04:10 +0200 (CEST)
From:   "Maciej W. Rozycki" <macro@orcam.me.uk>
To:     "H. Nikolaus Schaller" <hns@goldelico.com>
cc:     Arnd Bergmann <arnd@arndb.de>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Huacai Chen <chenhuacai@kernel.org>,
        Huacai Chen <chenhuacai@loongson.cn>,
        Jiaxun Yang <jiaxun.yang@flygoat.com>,
        linux-arch@vger.kernel.org, linux-mips@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/4] Reinstate and improve MIPS `do_div' implementation
In-Reply-To: <51BC7C74-68BF-4A8E-8CFB-DB4EBBC89706@goldelico.com>
Message-ID: <alpine.DEB.2.21.2104211904490.44318@angie.orcam.me.uk>
References: <alpine.DEB.2.21.2104200044060.44318@angie.orcam.me.uk> <51BC7C74-68BF-4A8E-8CFB-DB4EBBC89706@goldelico.com>
User-Agent: Alpine 2.21 (DEB 202 2017-01-01)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Precedence: bulk

On Wed, 21 Apr 2021, H. Nikolaus Schaller wrote:

> > In the end I have included four patches on this occasion: 1/4 is the test 
> > module, 2/4 is an inline documentation fix/clarification for the `do_div' 
> > wrapper, 3/4 enables the MIPS `__div64_32' backend and 4/4 adds a small 
> > performance improvement to it.
> 
> How can I apply them to the kernel? There is something wrong which makes
> git am fail.

 I don't know.  The changes were made against vanilla 5.12-rc7, but then 
the pieces affected have not changed for ages.  FWIW I can `git am' the 
series as received back just fine.

> > These changes have been verified with a DECstation system with an R3400 
> > MIPS I processor @40MHz and a MTI Malta system with a 5Kc MIPS64 processor 
> > @160MHz.
> 
> I'd like to test on ~320 MHz JZ4730.

 Sure, I'd love to hear how this code performs with other implementations.  

  Maciej