Re: Unaligned access in kernel on ARMv6+ (Re: CVS commit: src/sys/dev/usb)

[Greg Troxel <gdt%lexort.com@localhost>]

matthew green <mrg%eterna.com.au@localhost> writes:

>> In short, this is because -munaligned-access is enabled on ARMv6+ by
>> default for GCC. As the unaligned memory access is forbidden in the
>> supervisor mode unlike in the user mode, we need to explicitly specify
>> -mno-unaligned-access for kernel on ARMv6+.
>
> i think this seems like the right thing to do here.
>
> othewise we'd have to patch this all over..

Why do we generate code with unaligned access in user space?  That seems
surprising, if the processor isn't happy about it.