powerpc/64s/radix: Fix radix_kvm_prefetch_workaround paca access of not possible CPU

Sat Jun 23 22:56:03 AEST 2018

On Tue, 2018-06-12 at 09:38:08 UTC, Nicholas Piggin wrote:
> If possible CPUs are limited (e.g., by kexec), then the kvm prefetch
> workaround function can access the paca pointer for a !possible CPU.
> 
> Fixes: d2e60075a3d44 ("powerpc/64: Use array of paca pointers and allocate pacas individually")
> Cc: stable at kernel.org
> Reported-by: Pridhiviraj Paidipeddi <ppaidipe at linux.vnet.ibm.com>
> Tested-by: Pridhiviraj Paidipeddi <ppaidipe at linux.vnet.ibm.com>
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/758380b8155f69b4e2f77f27562f8a

cheers