Re: [PATCH] lightnvm: change max_phys_sect to ushort

["Matias Bjørling" <m@bjorling.me>]

On 11/12/2015 08:02 PM, Linus Torvalds wrote:
> On Thu, Nov 12, 2015 at 10:57 AM, Matias Bjørling <m@bjorling.me> wrote:
>>
>> Grah, I need to be more careful. I sent the wrong patch after I had fixed it
>> to unsigned short.
>
> Actually, I think "unsigned int" was better.
>
> You're not saving any space with "unsigned short" (the size of the
> structure will be rounded up to the alignment of it anyway), and we
> should generally strive to avoid 16-bit accesses unless there is some
> real reason for them, because they are often slower than either "char"
> or "int". Several architectures have weak support for 16-bit accesses
> (eg alpha), and even on x86 you end up having operand size overrides
> etc.
>

Thanks

> So unless there is a clear *reason* to use "short" - just don't.
>
>                     Linus
>