btrfs: make static code static & remove dead code

Big patch, but all it does is add statics to functions which
are in fact static, then remove the associated dead-code fallout.

removed functions:

btrfs_iref_to_path()
__btrfs_lookup_delayed_deletion_item()
__btrfs_search_delayed_insertion_item()
__btrfs_search_delayed_deletion_item()
find_eb_for_page()
btrfs_find_block_group()
range_straddles_pages()
extent_range_uptodate()
btrfs_file_extent_length()
btrfs_scrub_cancel_devid()
btrfs_start_transaction_lflush()

btrfs_print_tree() is left because it is used for debugging.
btrfs_start_transaction_lflush() and btrfs_reada_detach() are
left for symmetry.

ulist.c functions are left, another patch will take care of those.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

1 files changed, 5 insertions, 38 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index f651a37c7e0..ac132d9637b 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -70,6 +70,8 @@ static int btrfs_destroy_marked_extents(struct btrfs_root *root,
 					int mark);
 static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
 				       struct extent_io_tree *pinned_extents);
+static int btrfs_cleanup_transaction(struct btrfs_root *root);
+static void btrfs_error_commit_super(struct btrfs_root *root);
 
 /*
  * end_io_wq structs are used to do processing in task context when an IO is
@@ -531,41 +533,6 @@ static noinline int check_leaf(struct btrfs_root *root,
 	return 0;
 }
 
-struct extent_buffer *find_eb_for_page(struct extent_io_tree *tree,
-				       struct page *page, int max_walk)
-{
-	struct extent_buffer *eb;
-	u64 start = page_offset(page);
-	u64 target = start;
-	u64 min_start;
-
-	if (start < max_walk)
-		min_start = 0;
-	else
-		min_start = start - max_walk;
-
-	while (start >= min_start) {
-		eb = find_extent_buffer(tree, start, 0);
-		if (eb) {
-			/*
-			 * we found an extent buffer and it contains our page
-			 * horray!
-			 */
-			if (eb->start <= target &&
-			    eb->start + eb->len > target)
-				return eb;
-
-			/* we found an extent buffer that wasn't for us */
-			free_extent_buffer(eb);
-			return NULL;
-		}
-		if (start == 0)
-			break;
-		start -= PAGE_CACHE_SIZE;
-	}
-	return NULL;
-}
-
 static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
 			       struct extent_state *state, int mirror)
 {
@@ -3245,7 +3212,7 @@ int btrfs_calc_num_tolerated_disk_barrier_failures(
 	return num_tolerated_disk_barrier_failures;
 }
 
-int write_all_supers(struct btrfs_root *root, int max_mirrors)
+static int write_all_supers(struct btrfs_root *root, int max_mirrors)
 {
 	struct list_head *head;
 	struct btrfs_device *dev;
@@ -3611,7 +3578,7 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
 	return 0;
 }
 
-void btrfs_error_commit_super(struct btrfs_root *root)
+static void btrfs_error_commit_super(struct btrfs_root *root)
 {
 	mutex_lock(&root->fs_info->cleaner_mutex);
 	btrfs_run_delayed_iputs(root);
@@ -3879,7 +3846,7 @@ void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
 	*/
 }
 
-int btrfs_cleanup_transaction(struct btrfs_root *root)
+static int btrfs_cleanup_transaction(struct btrfs_root *root)
 {
 	struct btrfs_transaction *t;
 	LIST_HEAD(list);