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-rw-r--r--mm/mmu_notifier.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 2c8da9825fe3..3b9b3d0741b2 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -193,6 +193,16 @@ void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
id = srcu_read_lock(&srcu);
hlist_for_each_entry_rcu(mn, &mm->mmu_notifier_mm->list, hlist) {
+ /*
+ * Call invalidate_range here too to avoid the need for the
+ * subsystem of having to register an invalidate_range_end
+ * call-back when there is invalidate_range already. Usually a
+ * subsystem registers either invalidate_range_start()/end() or
+ * invalidate_range(), so this will be no additional overhead
+ * (besides the pointer check).
+ */
+ if (mn->ops->invalidate_range)
+ mn->ops->invalidate_range(mn, mm, start, end);
if (mn->ops->invalidate_range_end)
mn->ops->invalidate_range_end(mn, mm, start, end);
}
@@ -200,6 +210,21 @@ void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
}
EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range_end);
+void __mmu_notifier_invalidate_range(struct mm_struct *mm,
+ unsigned long start, unsigned long end)
+{
+ struct mmu_notifier *mn;
+ int id;
+
+ id = srcu_read_lock(&srcu);
+ hlist_for_each_entry_rcu(mn, &mm->mmu_notifier_mm->list, hlist) {
+ if (mn->ops->invalidate_range)
+ mn->ops->invalidate_range(mn, mm, start, end);
+ }
+ srcu_read_unlock(&srcu, id);
+}
+EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range);
+
static int do_mmu_notifier_register(struct mmu_notifier *mn,
struct mm_struct *mm,
int take_mmap_sem)