powerpc/mm/radix: Synchronize updates to the process table

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When writing to the process table, we need to ensure the store is
visible to a subsequent access by the MMU. We assume we never have
the PID active while doing the update, so a ptesync/isync pair
should hopefully be a big enough hammer for our purpose.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Benjamin Herrenschmidt 2017-07-07 16:12:16 -05:00 • committed by Michael Ellerman

parent c6bb0b8d42

commit 3a6a04706f

1 changed files with 8 additions and 0 deletions

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arch/powerpc/mm/mmu_context_book3s64.c

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