1 files changed, 24 insertions, 25 deletions

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 2bd0011450df..0477dca154ed 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -668,8 +668,8 @@ int find_inline_backref(struct extent_buffer *leaf, int slot,
  * roots of b-trees that reference the tree block.
  *
  * the basic idea of this function is check backrefs of a given block
- * to find upper level blocks that refernece the block, and then check
- * bakcrefs of these upper level blocks recursively. the recursion stop
+ * to find upper level blocks that reference the block, and then check
+ * backrefs of these upper level blocks recursively. the recursion stop
  * when tree root is reached or backrefs for the block is cached.
  *
  * NOTE: if we find backrefs for a block are cached, we know backrefs
@@ -1160,7 +1160,7 @@ out:
 			if (!RB_EMPTY_NODE(&upper->rb_node))
 				continue;
 
-			/* Add this guy's upper edges to the list to proces */
+			/* Add this guy's upper edges to the list to process */
 			list_for_each_entry(edge, &upper->upper, list[LOWER])
 				list_add_tail(&edge->list[UPPER], &list);
 			if (list_empty(&upper->upper))
@@ -1850,6 +1850,7 @@ again:
 			eb = read_tree_block(dest, old_bytenr, old_ptr_gen);
 			if (IS_ERR(eb)) {
 				ret = PTR_ERR(eb);
+				break;
 			} else if (!extent_buffer_uptodate(eb)) {
 				ret = -EIO;
 				free_extent_buffer(eb);
@@ -2395,7 +2396,7 @@ again:
 		}
 
 		/*
-		 * we keep the old last snapshod transid in rtranid when we
+		 * we keep the old last snapshot transid in rtranid when we
 		 * created the relocation tree.
 		 */
 		last_snap = btrfs_root_rtransid(&reloc_root->root_item);
@@ -2417,7 +2418,7 @@ again:
 	}
 out:
 	if (ret) {
-		btrfs_std_error(root->fs_info, ret, NULL);
+		btrfs_handle_fs_error(root->fs_info, ret, NULL);
 		if (!list_empty(&reloc_roots))
 			free_reloc_roots(&reloc_roots);
 
@@ -2615,7 +2616,7 @@ static int reserve_metadata_space(struct btrfs_trans_handle *trans,
 			 * only one thread can access block_rsv at this point,
 			 * so we don't need hold lock to protect block_rsv.
 			 * we expand more reservation size here to allow enough
-			 * space for relocation and we will return eailer in
+			 * space for relocation and we will return earlier in
 			 * enospc case.
 			 */
 			rc->block_rsv->size = tmp + rc->extent_root->nodesize *
@@ -2813,7 +2814,7 @@ static void mark_block_processed(struct reloc_control *rc,
 				 u64 bytenr, u32 blocksize)
 {
 	set_extent_bits(&rc->processed_blocks, bytenr, bytenr + blocksize - 1,
-			EXTENT_DIRTY, GFP_NOFS);
+			EXTENT_DIRTY);
 }
 
 static void __mark_block_processed(struct reloc_control *rc,
@@ -3129,10 +3130,10 @@ static int relocate_file_extent_cluster(struct inode *inode,
 	if (ret)
 		goto out;
 
-	index = (cluster->start - offset) >> PAGE_CACHE_SHIFT;
-	last_index = (cluster->end - offset) >> PAGE_CACHE_SHIFT;
+	index = (cluster->start - offset) >> PAGE_SHIFT;
+	last_index = (cluster->end - offset) >> PAGE_SHIFT;
 	while (index <= last_index) {
-		ret = btrfs_delalloc_reserve_metadata(inode, PAGE_CACHE_SIZE);
+		ret = btrfs_delalloc_reserve_metadata(inode, PAGE_SIZE);
 		if (ret)
 			goto out;
 
@@ -3145,7 +3146,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
 						   mask);
 			if (!page) {
 				btrfs_delalloc_release_metadata(inode,
-							PAGE_CACHE_SIZE);
+							PAGE_SIZE);
 				ret = -ENOMEM;
 				goto out;
 			}
@@ -3162,16 +3163,16 @@ static int relocate_file_extent_cluster(struct inode *inode,
 			lock_page(page);
 			if (!PageUptodate(page)) {
 				unlock_page(page);
-				page_cache_release(page);
+				put_page(page);
 				btrfs_delalloc_release_metadata(inode,
-							PAGE_CACHE_SIZE);
+							PAGE_SIZE);
 				ret = -EIO;
 				goto out;
 			}
 		}
 
 		page_start = page_offset(page);
-		page_end = page_start + PAGE_CACHE_SIZE - 1;
+		page_end = page_start + PAGE_SIZE - 1;
 
 		lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end);
 
@@ -3181,7 +3182,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
 		    page_start + offset == cluster->boundary[nr]) {
 			set_extent_bits(&BTRFS_I(inode)->io_tree,
 					page_start, page_end,
-					EXTENT_BOUNDARY, GFP_NOFS);
+					EXTENT_BOUNDARY);
 			nr++;
 		}
 
@@ -3191,7 +3192,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
 		unlock_extent(&BTRFS_I(inode)->io_tree,
 			      page_start, page_end);
 		unlock_page(page);
-		page_cache_release(page);
+		put_page(page);
 
 		index++;
 		balance_dirty_pages_ratelimited(inode->i_mapping);
@@ -4058,8 +4059,7 @@ restart:
 	}
 
 	btrfs_release_path(path);
-	clear_extent_bits(&rc->processed_blocks, 0, (u64)-1, EXTENT_DIRTY,
-			  GFP_NOFS);
+	clear_extent_bits(&rc->processed_blocks, 0, (u64)-1, EXTENT_DIRTY);
 
 	if (trans) {
 		btrfs_end_transaction_throttle(trans, rc->extent_root);
@@ -4253,12 +4253,11 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
 	btrfs_info(extent_root->fs_info, "relocating block group %llu flags %llu",
 	       rc->block_group->key.objectid, rc->block_group->flags);
 
-	ret = btrfs_start_delalloc_roots(fs_info, 0, -1);
-	if (ret < 0) {
-		err = ret;
-		goto out;
-	}
-	btrfs_wait_ordered_roots(fs_info, -1);
+	btrfs_wait_block_group_reservations(rc->block_group);
+	btrfs_wait_nocow_writers(rc->block_group);
+	btrfs_wait_ordered_roots(fs_info, -1,
+				 rc->block_group->key.objectid,
+				 rc->block_group->key.offset);
 
 	while (1) {
 		mutex_lock(&fs_info->cleaner_mutex);
@@ -4591,7 +4590,7 @@ int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
 
 /*
  * called before creating snapshot. it calculates metadata reservation
- * requried for relocating tree blocks in the snapshot
+ * required for relocating tree blocks in the snapshot
  */
 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
 			      u64 *bytes_to_reserve)