powerpc/8xx: Reduce DTLB miss handler by one insn

This reduces the DTLB miss handler hot path (user address path)
by one instruction by preserving r10.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2017-07-12 12:08:57 +02:00 • committed by Michael Ellerman
commit 2ef973a9af