[PATCH] Fix msr check in compat_sys_swapcontext

[Paul Mackerras]

Andreas Schwab writes:

> Paul Mackerras <paulus at samba.org> writes:
> 
> > we need to use get_user, not __get_user, since we haven't done an
> > access_ok() check on the address.
> 
> The address is always ok since its a compat pointer, see do_setcontext.

OK, since it's inside a CONFIG_PPC64 block.  I'll add a paragraph to
the patch description pointing that out.

Paul.