Merge tag 'trace-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...

[linux-2.6-block.git] / mm / mmu_notifier.c

diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 82bb1a939c0e496affc2849c1e1af795fe3d5d96..5119ff8467690f6696c63489e96062ece67c24fa 100644 (file)
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -247,37 +247,6 @@ void __mmu_notifier_invalidate_range(struct mm_struct *mm,
 }
 EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range);
 
-/*
- * Must be called while holding mm->mmap_sem for either read or write.
- * The result is guaranteed to be valid until mm->mmap_sem is dropped.
- */
-bool mm_has_blockable_invalidate_notifiers(struct mm_struct *mm)
-{
-       struct mmu_notifier *mn;
-       int id;
-       bool ret = false;
-
-       WARN_ON_ONCE(!rwsem_is_locked(&mm->mmap_sem));
-
-       if (!mm_has_notifiers(mm))
-               return ret;
-
-       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_start &&
-                   !mn->ops->invalidate_range_end)
-                               continue;
-
-               if (!(mn->ops->flags & MMU_INVALIDATE_DOES_NOT_BLOCK)) {
-                       ret = true;
-                       break;
-               }
-       }
-       srcu_read_unlock(&srcu, id);
-       return ret;
-}
-
 static int do_mmu_notifier_register(struct mmu_notifier *mn,
                                    struct mm_struct *mm,
                                    int take_mmap_sem)