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, 6 insertions, 3 deletions

diff --git a/fs/super.c b/fs/super.c
index f35ac6022109..1527e6a0ee35 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -37,6 +37,7 @@
 #include <linux/kobject.h>
 #include <linux/mutex.h>
 #include <linux/file.h>
+#include <linux/backing-dev.h>
 #include <asm/uaccess.h>
 #include "internal.h"
 
@@ -693,6 +694,7 @@ int set_anon_super(struct super_block *s, void *data)
                 return -EMFILE;
         }
         s->s_dev = MKDEV(0, dev & MINORMASK);
+        s->s_bdi = &noop_backing_dev_info;
         return 0;
 }
 
@@ -954,10 +956,11 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
         if (error < 0)
                 goto out_free_secdata;
         BUG_ON(!mnt->mnt_sb);
+        WARN_ON(!mnt->mnt_sb->s_bdi);
 
-        error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata);
-        if (error)
-                goto out_sb;
+        error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata);
+        if (error)
+                goto out_sb;
 
         /*
          * filesystems should never set s_maxbytes larger than MAX_LFS_FILESIZE