This allows page faults to be delivered when they happen.  Without this, it
can happen that a page fault will occur when SIGSEGV is disabled, and the
host will then just kill UML because it can't invoke the handler.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>