linux-kernel - Re: Yet more ARM breakage in linux-next

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Message-Id: <200812041157.15355.rusty@rustcorp.com.au>
Date:	Thu, 4 Dec 2008 11:57:14 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Russell King <rmk+lkml@....linux.org.uk>,
	linux-kernel@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Stephen Hemminger <shemminger@...tta.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: Yet more ARM breakage in linux-next

On Thursday 04 December 2008 10:07:44 Randy Dunlap wrote:
> Rusty Russell wrote:
> > (Yes, classic useless kerneldoc documentation doesn't actually *say*
> > this clearly).
>
> oh fud.  That's not a fault of kernel-doc, just of whoever wrote it.
> It's only as good as someone makes it.

Sorry that this came out wrong.  kernel-doc provides structure, but it can't 
provide content.  And authors seem unable to think from the POV of someone 
*using* the API.

With some work, I tracked it back to Stephen Hemminger for this comment in 
12d9c8420b9daa1da3d9e090640fb24bcd0deba2.  It's since been fixed and moved,
but it's still:

 * __fls: find last set bit in word
 * @word: The word to search
 *
 * Undefined if no set bit exists, so code should check against 0 first.

Which would be *fine* if fls() didn't have such confusing bit numbering and 
the exact same one-line description.

Thanks,
Rusty.
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