[Xen-devel] [PATCH 7/9] mm: allow preemption in apply_to_pte_range

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

Preemption is now allowed for lazy mmu mode, so don't disable
it for the inner loop of apply_to_pte_range.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
 mm/memory.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index b80cc31..baa999e 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1718,7 +1718,6 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t 
*pmd,
 
        BUG_ON(pmd_huge(*pmd));
 
-       preempt_disable();
        arch_enter_lazy_mmu_mode();
 
        token = pmd_pgtable(*pmd);
@@ -1730,7 +1729,6 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t 
*pmd,
        } while (pte++, addr += PAGE_SIZE, addr != end);
 
        arch_leave_lazy_mmu_mode();
-       preempt_enable();
 
        if (mm != &init_mm)
                pte_unmap_unlock(pte-1, ptl);
-- 
1.6.0.6


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