Re: [PATCH] Kill div64.h dupes, parenthesize do_div() macro params

[Linus Torvalds]

On Wed, 2 Jul 2003, Bernardo Innocenti wrote:
>
>  Wait! It's not documented at all that do_div() really does a
> 64bit/32bit division with 32bit remainder.

Oh, it's documented all right. It's even documented by the architectures 
that do it wrong (ie chris/arm26 say "we're not 64-bit but..")

> What's worse, it has different semantics on different archictecures:

only because some architectures on purpose get it wrong, because they 
don't care.

>  i386      64/32 -> 64q + 32r (inline asm + C for 64bit case)

This is the only version that has ever been valid.

It's a 64/32->64+32. No excuses, no nothing. There is no question about 
it.

		Linus