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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Wed, 24 Jan 2018 12:10:10 +0100
Message-ID: <CAK8P3a3PxsmNXDqYbivfCTL8NmnR==M91yjv_VV0zXwjzLxHuA@mail.gmail.com>
Subject: Re: [PATCH v6 07/36] nds32: Exception handling
To:     Vincent Chen <deanbo422@gmail.com>
Cc:     Greentime Hu <green.hu@gmail.com>,
        Greentime <greentime@andestech.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-arch <linux-arch@vger.kernel.org>,
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        Rob Herring <robh+dt@kernel.org>,
        Networking <netdev@vger.kernel.org>,
        DTML <devicetree@vger.kernel.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        David Howells <dhowells@redhat.com>,
        Will Deacon <will.deacon@arm.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        linux-serial@vger.kernel.org,
        Geert Uytterhoeven <geert.uytterhoeven@gmail.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Mark Rutland <mark.rutland@arm.com>, Greg KH <greg@kroah.com>,
        Guo Ren <ren_guo@c-sky.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        David Miller <davem@davemloft.net>,
        Jonas Bonn <jonas@southpole.se>,
        Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
        Stafford Horne <shorne@gmail.com>,
        Vincent Chen <vincentc@andestech.com>
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On Wed, Jan 24, 2018 at 12:09 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Wed, Jan 24, 2018 at 11:53 AM, Vincent Chen <deanbo422@gmail.com> wrote:
>> 2018-01-18 18:14 GMT+08:00 Arnd Bergmann <arnd@arndb.de>:

> Ok. I still wonder about the kernel part of this though: is it a good idea
> for user space to configure whether the kernel does unaligned
> accesses? I would think that the kernel should just be fixed in such
> a case.

To clarify: I'm asking only about unaligned accesses from kernel code itself,
which is generally considered a bug when
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is disabled.

      Arnd