Update to 3.4-final.

[linux-flexiantxendom0-3.2.10.git] / mm / mmu_notifier.c

diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 7e33f2c..9a611d3 100644 (file)
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -11,11 +11,12 @@
 
 #include <linux/rculist.h>
 #include <linux/mmu_notifier.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/mm.h>
 #include <linux/err.h>
 #include <linux/rcupdate.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 
 /*
  * This function can't run concurrently against mmu_notifier_register
@@ -99,6 +100,26 @@ int __mmu_notifier_clear_flush_young(struct mm_struct *mm,
        return young;
 }
 
+int __mmu_notifier_test_young(struct mm_struct *mm,
+                             unsigned long address)
+{
+       struct mmu_notifier *mn;
+       struct hlist_node *n;
+       int young = 0;
+
+       rcu_read_lock();
+       hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) {
+               if (mn->ops->test_young) {
+                       young = mn->ops->test_young(mn, mm, address);
+                       if (young)
+                               break;
+               }
+       }
+       rcu_read_unlock();
+
+       return young;
+}
+
 void __mmu_notifier_change_pte(struct mm_struct *mm, unsigned long address,
                               pte_t pte)
 {