memory hotplug: document the memory hotplug notifier
authorYasunori Goto <y-goto@jp.fujitsu.com>
Sun, 21 Oct 2007 23:41:36 +0000 (16:41 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Mon, 22 Oct 2007 15:13:17 +0000 (08:13 -0700)
Add description about event notification callback routine to the document

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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