Merge remote branch 'anholt/drm-intel-next' into drm-next

* anholt/drm-intel-next: (515 commits)
  drm/i915: Fix out of tree builds
  drm/i915: move fence lru to struct drm_i915_fence_reg
  drm/i915: don't allow tiling changes on pinned buffers v2
  drm/i915: Be extra careful about A/D matching for multifunction SDVO
  drm/i915: Fix DDC bus selection for multifunction SDVO
  drm/i915: cleanup mode setting before unmapping registers
  drm/i915: Make fbc control wrapper functions
  drm/i915: Wait for the GPU whilst shrinking, if truly desperate.
  drm/i915: Use spatio-temporal dithering on PCH
  [MTD] Remove zero-length files mtdbdi.c and internal.ho
  pata_pcmcia / ide-cs: Fix bad hashes for Transcend and kingston IDs
  libata: Fix several inaccuracies in developer's guide
  slub: Fix bad boundary check in init_kmem_cache_nodes()
  raid6: fix recovery performance regression
  KEYS: call_sbin_request_key() must write lock keyrings before modifying them
  KEYS: Use RCU dereference wrappers in keyring key type code
  KEYS: find_keyring_by_name() can gain access to a freed keyring
  ALSA: hda: Fix 0 dB for Packard Bell models using Conexant CX20549 (Venice)
  ALSA: hda - Add quirk for Dell Inspiron 19T using a Conexant CX20582
  ALSA: take tu->qlock with irqs disabled
  ...

1 files changed, 5 insertions, 4 deletions

diff --git a/mm/rmap.c b/mm/rmap.c
index 526704e8215d..07fc94758799 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -133,8 +133,8 @@ int anon_vma_prepare(struct vm_area_struct *vma)
                                 goto out_enomem_free_avc;
                         allocated = anon_vma;
                 }
-                spin_lock(&anon_vma->lock);
 
+                spin_lock(&anon_vma->lock);
                 /* page_table_lock to protect against threads */
                 spin_lock(&mm->page_table_lock);
                 if (likely(!vma->anon_vma)) {
@@ -144,14 +144,15 @@ int anon_vma_prepare(struct vm_area_struct *vma)
                         list_add(&avc->same_vma, &vma->anon_vma_chain);
                         list_add(&avc->same_anon_vma, &anon_vma->head);
                         allocated = NULL;
+                        avc = NULL;
                 }
                 spin_unlock(&mm->page_table_lock);
-
                 spin_unlock(&anon_vma->lock);
-                if (unlikely(allocated)) {
+
+                if (unlikely(allocated))
                         anon_vma_free(allocated);
+                if (unlikely(avc))
                         anon_vma_chain_free(avc);
-                }
         }
         return 0;