regset: Return -EFAULT, not -EIO, on host-side memory fault
There is only one error code to return for a bad user-space buffer pointer passed to a system call in the same address space as the system call is executed, and that is EFAULT. Furthermore, the low-level access routines, which catch most of the faults, return EFAULT already. Signed-off-by: NH. Peter Anvin <hpa@zytor.com> Reviewed-by: NOleg Nesterov <oleg@redhat.com> Acked-by: NRoland McGrath <roland@hack.frob.com> Cc: <stable@vger.kernel.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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