2018-01-24 19:10 GMT+08:00 Arnd Bergmann [off-list ref]:

On Wed, Jan 24, 2018 at 12:09 PM, Arnd Bergmann [off-list ref] wrote:

quoted

On Wed, Jan 24, 2018 at 11:53 AM, Vincent Chen [off-list ref] wrote:

quoted

2018-01-18 18:14 GMT+08:00 Arnd Bergmann [off-list ref]:

quoted

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