KVM: PPC: Use READ_ONCE when dereferencing pte_t pointer

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pte can get updated from other CPUs as part of multiple activities
like THP split, huge page collapse, unmap. We need to make sure we
don't reload the pte value again and again for different checks.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Aneesh Kumar K.V 2015-03-30 10:39:12 +05:30 • committed by Michael Ellerman

parent 1cbee462a5

commit 5e1d44aef1

2 changed files with 16 additions and 9 deletions

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5

arch/powerpc/include/asm/kvm_book3s_64.h

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20

arch/powerpc/kvm/e500_mmu_host.c

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