From: Bodo Stroesser - Set PTRACE_DTRACE and singlestep_syscall correctly. 
Pass out TRACESYSGOOD and make sure the parent gets notified in
ptrace_syscall.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>