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This patch adds paravirt-ops hooks in pv_mmu_ops for ptep_modify_prot_start and ptep_modify_prot_commit. This allows the hypervisor-specific backends to implement these in some more efficient way. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>