Fix sparse warnings

    warning: cast removes address space of expression

	for uses of put_user() on x86_64 caused by doing __m(addr) in
	__put_user_asm() with addr a __user pointer.
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>