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    SubjectRe: [PATCH v6 07/36] nds32: Exception handling
    2018-01-24 19:10 GMT+08:00 Arnd Bergmann <arnd@arndb.de>:
    > 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

    Thanks for your comments.

    For performance, we decide always disable
    CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS even if hardware supports
    unaligned accessing. Therefore, I will remove kernel unaligned accessing from
    nds32/mm/alignment.c. In other words, alignment.c only addresses unaligned
    accessing for user space.

    Vincent

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