linux-kernel - Re: lots of code could be simplified by using ARRAY

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Message-ID: <Pine.LNX.4.64.0612160802250.3660@localhost.localdomain>
Date:	Sat, 16 Dec 2006 08:09:25 -0500 (EST)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Pavel Machek <pavel@....cz>
cc:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: lots of code could be simplified by using ARRAY_SIZE()

On Sat, 16 Dec 2006, Pavel Machek wrote:

> Hi!
>
> >   there are numerous places throughout the source tree that apparently
> > calculate the size of an array using the construct
> > "sizeof(fubar)/sizeof(fubar[0])". see for yourself:
> >
> >   $ grep -Er "sizeof\((.*)\) ?/ ?sizeof\(\1\[0\]\)" *
> >
> > but we already have, from "include/linux/kernel.h":
> >
> >   #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
>
> Hmmm. quite misleading name :-(. ARRAY_LEN would be better.

i suspect it's *way* too late to make that kind of change, given that
"ARRAY_SIZE" is firmly ensconced in countless places in the source
tree and that would be a major, disruptive change.

even *i* wouldn't try to promote that idea.  :-)

rday
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