Merge branch 'master' into for-next

Fast-forwarded to current state of Linus' tree as there are patches to be
applied for files that didn't exist on the old branch.

1 files changed, 6 insertions, 12 deletions

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 027100d30227..befc87531e4f 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -14,17 +14,11 @@
 
 static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
 
-void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
-{
-}
-EXPORT_SYMBOL(default_unplug_io_fn);
-
 struct backing_dev_info default_backing_dev_info = {
         .name           = "default",
         .ra_pages       = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE,
         .state          = 0,
         .capabilities   = BDI_CAP_MAP_COPY,
-        .unplug_io_fn   = default_unplug_io_fn,
 };
 EXPORT_SYMBOL_GPL(default_backing_dev_info);
 
@@ -73,14 +67,14 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v)
         struct inode *inode;
 
         nr_wb = nr_dirty = nr_io = nr_more_io = 0;
-        spin_lock(&inode_lock);
+        spin_lock(&inode_wb_list_lock);
         list_for_each_entry(inode, &wb->b_dirty, i_wb_list)
                 nr_dirty++;
         list_for_each_entry(inode, &wb->b_io, i_wb_list)
                 nr_io++;
         list_for_each_entry(inode, &wb->b_more_io, i_wb_list)
                 nr_more_io++;
-        spin_unlock(&inode_lock);
+        spin_unlock(&inode_wb_list_lock);
 
         global_dirty_limits(&background_thresh, &dirty_thresh);
         bdi_thresh = bdi_dirty_limit(bdi, dirty_thresh);
@@ -604,7 +598,7 @@ static void bdi_prune_sb(struct backing_dev_info *bdi)
         spin_lock(&sb_lock);
         list_for_each_entry(sb, &super_blocks, s_list) {
                 if (sb->s_bdi == bdi)
-                        sb->s_bdi = NULL;
+                        sb->s_bdi = &default_backing_dev_info;
         }
         spin_unlock(&sb_lock);
 }
@@ -682,11 +676,11 @@ void bdi_destroy(struct backing_dev_info *bdi)
         if (bdi_has_dirty_io(bdi)) {
                 struct bdi_writeback *dst = &default_backing_dev_info.wb;
 
-                spin_lock(&inode_lock);
+                spin_lock(&inode_wb_list_lock);
                 list_splice(&bdi->wb.b_dirty, &dst->b_dirty);
                 list_splice(&bdi->wb.b_io, &dst->b_io);
                 list_splice(&bdi->wb.b_more_io, &dst->b_more_io);
-                spin_unlock(&inode_lock);
+                spin_unlock(&inode_wb_list_lock);
         }
 
         bdi_unregister(bdi);
@@ -793,7 +787,7 @@ EXPORT_SYMBOL(congestion_wait);
  * jiffies for either a BDI to exit congestion of the given @sync queue
  * or a write to complete.
  *
- * In the absense of zone congestion, cond_resched() is called to yield
+ * In the absence of zone congestion, cond_resched() is called to yield
  * the processor if necessary but otherwise does not sleep.
  *
  * The return value is 0 if the sleep is for the full timeout. Otherwise,