From: Jeff Dike <jdike@addtoit.com>

This patch adds ptrace_setfpregs and makes these functions return -errno on
failure.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>