powerpc/sstep: mullw should calculate a 64 bit signed result

[Michael Ellerman]

On Tue, 2017-09-19 at 23:32:19 UTC, Anton Blanchard wrote:
> From: Anton Blanchard <anton at samba.org>
> 
> mullw should do a 32 bit signed multiply and create a 64 bit signed
> result. It currently truncates the result to 32 bits.
> 
> Signed-off-by: Anton Blanchard <anton at samba.org>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/1575fe06f6b1d156ed31fb22c8631d

cheers