Re: [PATCH] lightnvm: change max_phys_sect to ushort

From: Matias BjÃrling
Date: Thu Nov 12 2015 - 14:05:33 EST

On 11/12/2015 08:02 PM, Linus Torvalds wrote:
On Thu, Nov 12, 2015 at 10:57 AM, Matias BjÃrling <m@xxxxxxxxxxx> 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


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


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