From: Jan Topinski <simcha@chatka.org>

Add support to automatically disable laptop mode when the battery almost
runs out.  This prevents data loss when the battery actually runs out.
Signed-off-by: Bart Samwel <bart@samwel.tk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>