Btrfs: remove #if 0 code
Btrfs had some old code sitting around under #if 0, this drops it.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 44c94d8..77f9a3b 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -584,18 +584,7 @@
btrfs_set_work_high_prio(&async->work);
btrfs_queue_worker(&fs_info->workers, &async->work);
-#if 0
- int limit = btrfs_async_submit_limit(fs_info);
- if (atomic_read(&fs_info->nr_async_submits) > limit) {
- wait_event_timeout(fs_info->async_submit_wait,
- (atomic_read(&fs_info->nr_async_submits) < limit),
- HZ/10);
- wait_event_timeout(fs_info->async_submit_wait,
- (atomic_read(&fs_info->nr_async_bios) < limit),
- HZ/10);
- }
-#endif
while (atomic_read(&fs_info->async_submit_draining) &&
atomic_read(&fs_info->nr_async_submits)) {
wait_event(fs_info->async_submit_wait,
@@ -770,27 +759,6 @@
}
}
-#if 0
-static int btree_writepage(struct page *page, struct writeback_control *wbc)
-{
- struct buffer_head *bh;
- struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
- struct buffer_head *head;
- if (!page_has_buffers(page)) {
- create_empty_buffers(page, root->fs_info->sb->s_blocksize,
- (1 << BH_Dirty)|(1 << BH_Uptodate));
- }
- head = page_buffers(page);
- bh = head;
- do {
- if (buffer_dirty(bh))
- csum_tree_block(root, bh, 0);
- bh = bh->b_this_page;
- } while (bh != head);
- return block_write_full_page(page, btree_get_block, wbc);
-}
-#endif
-
static struct address_space_operations btree_aops = {
.readpage = btree_readpage,
.writepage = btree_writepage,
@@ -1278,11 +1246,7 @@
int ret = 0;
struct btrfs_device *device;
struct backing_dev_info *bdi;
-#if 0
- if ((bdi_bits & (1 << BDI_write_congested)) &&
- btrfs_congested_async(info, 0))
- return 1;
-#endif
+
list_for_each_entry(device, &info->fs_devices->devices, dev_list) {
if (!device->bdev)
continue;
@@ -2334,16 +2298,6 @@
btrfs_stop_workers(&fs_info->endio_write_workers);
btrfs_stop_workers(&fs_info->submit_workers);
-#if 0
- while (!list_empty(&fs_info->hashers)) {
- struct btrfs_hasher *hasher;
- hasher = list_entry(fs_info->hashers.next, struct btrfs_hasher,
- hashers);
- list_del(&hasher->hashers);
- crypto_free_hash(&fs_info->hash_tfm);
- kfree(hasher);
- }
-#endif
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index c33b540..fe9eb99 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1401,69 +1401,6 @@
return total_bytes;
}
-#if 0
-/*
- * helper function to lock both pages and extents in the tree.
- * pages must be locked first.
- */
-static int lock_range(struct extent_io_tree *tree, u64 start, u64 end)
-{
- unsigned long index = start >> PAGE_CACHE_SHIFT;
- unsigned long end_index = end >> PAGE_CACHE_SHIFT;
- struct page *page;
- int err;
-
- while (index <= end_index) {
- page = grab_cache_page(tree->mapping, index);
- if (!page) {
- err = -ENOMEM;
- goto failed;
- }
- if (IS_ERR(page)) {
- err = PTR_ERR(page);
- goto failed;
- }
- index++;
- }
- lock_extent(tree, start, end, GFP_NOFS);
- return 0;
-
-failed:
- /*
- * we failed above in getting the page at 'index', so we undo here
- * up to but not including the page at 'index'
- */
- end_index = index;
- index = start >> PAGE_CACHE_SHIFT;
- while (index < end_index) {
- page = find_get_page(tree->mapping, index);
- unlock_page(page);
- page_cache_release(page);
- index++;
- }
- return err;
-}
-
-/*
- * helper function to unlock both pages and extents in the tree.
- */
-static int unlock_range(struct extent_io_tree *tree, u64 start, u64 end)
-{
- unsigned long index = start >> PAGE_CACHE_SHIFT;
- unsigned long end_index = end >> PAGE_CACHE_SHIFT;
- struct page *page;
-
- while (index <= end_index) {
- page = find_get_page(tree->mapping, index);
- unlock_page(page);
- page_cache_release(page);
- index++;
- }
- unlock_extent(tree, start, end, GFP_NOFS);
- return 0;
-}
-#endif
-
/*
* set the private field for a given byte offset in the tree. If there isn't
* an extent_state there already, this does nothing.
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index da3ed96..1d51dc3 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -272,83 +272,6 @@
return 0;
}
-int btrfs_check_file(struct btrfs_root *root, struct inode *inode)
-{
- return 0;
-#if 0
- struct btrfs_path *path;
- struct btrfs_key found_key;
- struct extent_buffer *leaf;
- struct btrfs_file_extent_item *extent;
- u64 last_offset = 0;
- int nritems;
- int slot;
- int found_type;
- int ret;
- int err = 0;
- u64 extent_end = 0;
-
- path = btrfs_alloc_path();
- ret = btrfs_lookup_file_extent(NULL, root, path, inode->i_ino,
- last_offset, 0);
- while (1) {
- nritems = btrfs_header_nritems(path->nodes[0]);
- if (path->slots[0] >= nritems) {
- ret = btrfs_next_leaf(root, path);
- if (ret)
- goto out;
- nritems = btrfs_header_nritems(path->nodes[0]);
- }
- slot = path->slots[0];
- leaf = path->nodes[0];
- btrfs_item_key_to_cpu(leaf, &found_key, slot);
- if (found_key.objectid != inode->i_ino)
- break;
- if (found_key.type != BTRFS_EXTENT_DATA_KEY)
- goto out;
-
- if (found_key.offset < last_offset) {
- WARN_ON(1);
- btrfs_print_leaf(root, leaf);
- printk(KERN_ERR "inode %lu found offset %llu "
- "expected %llu\n", inode->i_ino,
- (unsigned long long)found_key.offset,
- (unsigned long long)last_offset);
- err = 1;
- goto out;
- }
- extent = btrfs_item_ptr(leaf, slot,
- struct btrfs_file_extent_item);
- found_type = btrfs_file_extent_type(leaf, extent);
- if (found_type == BTRFS_FILE_EXTENT_REG) {
- extent_end = found_key.offset +
- btrfs_file_extent_num_bytes(leaf, extent);
- } else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
- struct btrfs_item *item;
- item = btrfs_item_nr(leaf, slot);
- extent_end = found_key.offset +
- btrfs_file_extent_inline_len(leaf, extent);
- extent_end = (extent_end + root->sectorsize - 1) &
- ~((u64)root->sectorsize - 1);
- }
- last_offset = extent_end;
- path->slots[0]++;
- }
- if (0 && last_offset < inode->i_size) {
- WARN_ON(1);
- btrfs_print_leaf(root, leaf);
- printk(KERN_ERR "inode %lu found offset %llu size %llu\n",
- inode->i_ino, (unsigned long long)last_offset,
- (unsigned long long)inode->i_size);
- err = 1;
-
- }
-out:
- btrfs_free_path(path);
- return err;
-#endif
-}
-
/*
* this is very complex, but the basic idea is to drop all extents
* in the range start - end. hint_block is filled in with a block number
@@ -689,7 +612,6 @@
unlock_extent(&BTRFS_I(inode)->io_tree, orig_locked_end,
locked_end - 1, GFP_NOFS);
}
- btrfs_check_file(root, inode);
return ret;
}