powerpc/mm: Fix lazy icache flush on pre-POWER5

Wed Nov 30 23:27:13 AEDT 2016

On Tue, 2016-11-29 at 02:13:46 UTC, Benjamin Herrenschmidt wrote:
> On 64-bit CPUs with no-execute support and non-snooping icache, such as
> 970 or POWER4, we have a software mechanism to ensure coherency of the
> cache (using exec faults when needed).
> 
> This was broken due to a logic inversion when that code was rewritten
> from assembly to C.
> 
> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Fixes: 91f1da99792a1d133df94c4753510305353064a1
> Fixes: 89ff725051d177556b23d80f2a30f880a657a6c1
> Fixes: a43c0eb8364c022725df586e91dd753633374d66
> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/dd7b2f035ec41a409f7a7cec7aabc0

cheers