From: Christoph Hellwig <hch@lst.de>

socket->{a,c}_region aren't ever touched elsewhere, so let's kill this.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>