[PATCH] force stackpointer alignment in 64bit kernel

[Olaf Hering]

 On Fri, Mar 03, Segher Boessenkool wrote:

> > The stackpointer came from 32bit code, which appearently has different
> > alignment rules than 64bit code. The chain was yaboot -> zImage ->  
> > vmlinux
> > Force the stackpointer to be 16 byte aligned.
> 
> The stack pointer is required to be 16-byte aligned when the
> client program is started, on 32-bit as well.

See http://ozlabs.org/pipermail/linuxppc-dev/2006-March/021342.html

Either yaboot and/or zImage need to force a stack alignment, or we apply
the 2 liner.