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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-11-05 16:33:22 +1100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-11-06 14:13:53 +1100
commit0c4888ef1d8a8b82c29075ce7e257ff795af15c7 (patch)
tree22f37dca43e49a79236b1279511778a1e8d12c61 /arch/powerpc/net
parent36954dc78d8a1dcd4780cf4bd0fc6292791821b9 (diff)
downloadlinux-0c4888ef1d8a8b82c29075ce7e257ff795af15c7.tar.bz2
powerpc: Fix fatal SLB miss when restoring PPR
When restoring the PPR value, we incorrectly access the thread structure at a time where MSR:RI is clear, which means we cannot recover from nested faults. However the thread structure isn't covered by the "bolted" SLB entries and thus accessing can fault. This fixes it by splitting the code so that the PPR value is loaded into a GPR before MSR:RI is cleared. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/net')
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