mm: rename drop_anon_vma() to put_anon_vma()

The normal code pattern used in the kernel is: get/put.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 18 deletions

diff --git a/mm/ksm.c b/mm/ksm.c
index c2b2a94f9d67..1bbe785aa559 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -301,20 +301,6 @@ static inline int in_stable_tree(struct rmap_item *rmap_item)
         return rmap_item->address & STABLE_FLAG;
 }
 
-static void hold_anon_vma(struct rmap_item *rmap_item,
-                          struct anon_vma *anon_vma)
-{
-        rmap_item->anon_vma = anon_vma;
-        get_anon_vma(anon_vma);
-}
-
-static void ksm_drop_anon_vma(struct rmap_item *rmap_item)
-{
-        struct anon_vma *anon_vma = rmap_item->anon_vma;
-
-        drop_anon_vma(anon_vma);
-}
-
 /*
  * ksmd, and unmerge_and_remove_all_rmap_items(), must not touch an mm's
  * page tables after it has passed through ksm_exit() - which, if necessary,
@@ -397,7 +383,7 @@ static void break_cow(struct rmap_item *rmap_item)
          * It is not an accident that whenever we want to break COW
          * to undo, we also need to drop a reference to the anon_vma.
          */
-        ksm_drop_anon_vma(rmap_item);
+        put_anon_vma(rmap_item->anon_vma);
 
         down_read(&mm->mmap_sem);
         if (ksm_test_exit(mm))
@@ -466,7 +452,7 @@ static void remove_node_from_stable_tree(struct stable_node *stable_node)
                         ksm_pages_sharing--;
                 else
                         ksm_pages_shared--;
-                ksm_drop_anon_vma(rmap_item);
+                put_anon_vma(rmap_item->anon_vma);
                 rmap_item->address &= PAGE_MASK;
                 cond_resched();
         }
@@ -554,7 +540,7 @@ static void remove_rmap_item_from_tree(struct rmap_item *rmap_item)
                 else
                         ksm_pages_shared--;
 
-                ksm_drop_anon_vma(rmap_item);
+                put_anon_vma(rmap_item->anon_vma);
                 rmap_item->address &= PAGE_MASK;
 
         } else if (rmap_item->address & UNSTABLE_FLAG) {
@@ -949,7 +935,8 @@ static int try_to_merge_with_ksm_page(struct rmap_item *rmap_item,
                 goto out;
 
         /* Must get reference to anon_vma while still holding mmap_sem */
-        hold_anon_vma(rmap_item, vma->anon_vma);
+        rmap_item->anon_vma = vma->anon_vma;
+        get_anon_vma(vma->anon_vma);
 out:
         up_read(&mm->mmap_sem);
         return err;