Messages in this thread |  | | From | Vincent Chen <> | Date | Tue, 30 Jan 2018 18:01:52 +0800 | Subject | Re: [PATCH v6 07/36] nds32: Exception handling |
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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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