Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix reservations in btrfs_page_mkwrite
  Btrfs: advance window_start if we're using a bitmap
  btrfs: mask out gfp flags in releasepage
  Btrfs: fix enospc error caused by wrong checks of the chunk
  Btrfs: do not defrag a file partially
  Btrfs: fix warning for 32-bit build of fs/btrfs/check-integrity.c
  Btrfs: use cluster->window_start when allocating from a cluster bitmap
  Btrfs: Check for NULL page in extent_range_uptodate
  btrfs: Fix busyloops in transaction waiting code
  Btrfs: make sure a bitmap has enough bytes
  Btrfs: fix uninit warning in backref.c

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index d20ff87ca603..c2f20594c9f7 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2242,7 +2242,7 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
                 if (entry->bitmap) {
                         ret = btrfs_alloc_from_bitmap(block_group,
                                                       cluster, entry, bytes,
-                                                      min_start);
+                                                      cluster->window_start);
                         if (ret == 0) {
                                 node = rb_next(&entry->offset_index);
                                 if (!node)
@@ -2251,6 +2251,7 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
                                                  offset_index);
                                 continue;
                         }
+                        cluster->window_start += bytes;
                 } else {
                         ret = entry->offset;
 
@@ -2475,7 +2476,7 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
         }
 
         list_for_each_entry(entry, bitmaps, list) {
-                if (entry->bytes < min_bytes)
+                if (entry->bytes < bytes)
                         continue;
                 ret = btrfs_bitmap_cluster(block_group, entry, cluster, offset,
                                            bytes, cont1_bytes, min_bytes);