[PATCH 2/2] mm/apply_to_range: call pte function with lazy updates

[Jeremy Fitzhardinge]

Make the pte-level function in apply_to_range be called in lazy mmu
mode, so that any pagetable modifications can be batched.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
mm/memory.c |    4 ++++
1 file changed, 4 insertions(+)

===================================================================
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1545,6 +1545,8 @@

	BUG_ON(pmd_huge(*pmd));

+	arch_enter_lazy_mmu_mode();
+
	token = pmd_pgtable(*pmd);

	do {
@@ -1552,6 +1554,8 @@
		if (err)
			break;
	} while (pte++, addr += PAGE_SIZE, addr != end);
+
+	arch_leave_lazy_mmu_mode();

	if (mm != &init_mm)
		pte_unmap_unlock(pte-1, ptl);


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