linux-kernel - Documentation for sysfs, hotplug, and firmware loading.

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Message-Id: <200707171703.31340.rob@landley.net>
Date:	Tue, 17 Jul 2007 17:03:31 -0400
From:	Rob Landley <rob@...dley.net>
To:	linux-kernel@...r.kernel.org
Cc:	"Greg KH" <greg@...ah.com>, Michael-Luke Jones <mlj28@....ac.uk>,
	Krzysztof Halasa <khc@...waw.pl>,
	Rod Whitby <rod@...tby.id.au>,
	Russell King <rmk@....linux.org.uk>, khc@...waw.pl,
	david@...g.hm
Subject: Documentation for sysfs, hotplug, and firmware loading.

Here's some sysfs/hotplug/firmware loading documentation I wrote.  I finally 
tracked down the netlink bits to finish it up, so I can send it out to the 
world.

What's wrong with it? :)

Note, I still need to actually confirm that /sbin/hotplug can be called from 
initramfs by a statically linked device to load firmware before init gets 
spawned.  It should work, and was explicitly discussed as a design goal a 
year or two back, but it might need a bugfix patch to actually, you know, 
_work_.

(P.S.  I'd cc Kay Sievers on this, but he's still spam-blocking my email.  
Thanks to Kay for answer lots of questions about this at OLS, and to Fank 
Sorenson who wrote a netlink implementation of mdev back in 2005 that I dug 
up to figure out how that part works.)
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.

View attachment "sysfs.txt" of type "text/plain" (9061 bytes)