linux-kernel - Re: [KJ][PATCH 02/03]ROUND_UP|DOWN macro cleanup in arch/ia64,x86

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Date:	Wed, 30 May 2007 23:57:49 +0200
From:	Oleg Verych <olecom@...wer.upol.cz>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	"Milind Arun Choudhary" <milindchoudhary@...il.com>,
	<kernel-janitors@...ts.osdl.org>, <linux-ia64@...r.kernel.org>,
	<discuss@...-64.org>, <linux-kernel@...r.kernel.org>,
	<akpm@...ux-foundation.org>, <ak@...e.de>
Subject: Re: [KJ][PATCH 02/03]ROUND_UP|DOWN macro cleanup in arch/ia64,x86_64

* From: "Luck, Tony"
* Date: Fri, 13 Apr 2007 09:45:49 -0700

>> So as ALIGN macro does the same work as ROUNDUP,
>
> Although it is mathematically the same operation, the
> semantic associations of the name are important too.
[]
> Maybe this is because I started out in mathematics before
> discovering that computers were so much fun, or maybe it
> is a British-English bias ... I can't tell, but it makes
> sense to me to use ROUNDUP in some places, and ALIGN in
> others.

I agree. I came from neither one (still coming); first look and vague
semantics of ALIGN macro, English confusion, a bit of laziness, led me to
stupid messages about aligning, Linus being so kind to reply, a couple of
months ago. Anyway i did that after some patching and re-patching that
macro by gurus :).

> If ROUNDUP isn't available everywhere, then it should be. To
> avoid code duplication perhaps we should add:
>
>     #define ROUNDUP(size, len) ALIGN((size), (len))
>
> and delete the previous ROUNDUP definition?

And i would vote for "align" via "round".
____
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