tree 3a96a7c0263b01b4706a665e9d9cbfc76d3f7011
parent 004b35063296b6772fa72404a35b498f1e71e87e
author Joakim Tjernlund <joakim.tjernlund@transmode.se> 1262063458 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1263522007 +1100

powerpc/8xx: Always pin kernel instruction TLB

Various kernel asm modifies SRR0/SRR1 just before executing
a rfi. If such code crosses a page boundary you risk a TLB miss
which will clobber SRR0/SRR1. Avoid this by always pinning
kernel instruction TLB space.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>