Btrfs: BUG_ON is deleted from the caller of btrfs_truncate_item & btrfs_extend_item

Currently, btrfs_truncate_item and btrfs_extend_item returns only 0.
So, the check by BUG_ON in the caller is unnecessary.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

7 files changed, 2 insertions, 17 deletions

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 84d7ca1fe0b..6f1a59cc41f 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -3216,7 +3216,6 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
                         struct btrfs_path *path,
                         u32 new_size, int from_end)
 {
-        int ret = 0;
         int slot;
         struct extent_buffer *leaf;
         struct btrfs_item *item;
@@ -3314,12 +3313,11 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
         btrfs_set_item_size(leaf, item, new_size);
         btrfs_mark_buffer_dirty(leaf);
 
-        ret = 0;
         if (btrfs_leaf_free_space(root, leaf) < 0) {
                 btrfs_print_leaf(root, leaf);
                 BUG();
         }
-        return ret;
+        return 0;
 }
 
 /*
@@ -3329,7 +3327,6 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans,
                       struct btrfs_root *root, struct btrfs_path *path,
                       u32 data_size)
 {
-        int ret = 0;
         int slot;
         struct extent_buffer *leaf;
         struct btrfs_item *item;
@@ -3394,12 +3391,11 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans,
         btrfs_set_item_size(leaf, item, old_size + data_size);
         btrfs_mark_buffer_dirty(leaf);
 
-        ret = 0;
         if (btrfs_leaf_free_space(root, leaf) < 0) {
                 btrfs_print_leaf(root, leaf);
                 BUG();
         }
-        return ret;
+        return 0;
 }
 
 /*
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index dec93485d53..dd421c48c35 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -50,7 +50,6 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle
                 if (di)
                         return ERR_PTR(-EEXIST);
                 ret = btrfs_extend_item(trans, root, path, data_size);
-                WARN_ON(ret > 0);
         }
         if (ret < 0)
                 return ERR_PTR(ret);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 9f5fdd37451..103e141afeb 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -947,7 +947,6 @@ static int convert_extent_item_v0(struct btrfs_trans_handle *trans,
         BUG_ON(ret);
 
         ret = btrfs_extend_item(trans, root, path, new_size);
-        BUG_ON(ret);
 
         leaf = path->nodes[0];
         item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
@@ -1555,7 +1554,6 @@ int setup_inline_extent_backref(struct btrfs_trans_handle *trans,
         size = btrfs_extent_inline_ref_size(type);
 
         ret = btrfs_extend_item(trans, root, path, size);
-        BUG_ON(ret);
 
         ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
         refs = btrfs_extent_refs(leaf, ei);
@@ -1684,7 +1682,6 @@ int update_inline_extent_backref(struct btrfs_trans_handle *trans,
                                               end - ptr - size);
                 item_size -= size;
                 ret = btrfs_truncate_item(trans, root, path, item_size, 1);
-                BUG_ON(ret);
         }
         btrfs_mark_buffer_dirty(leaf);
         return 0;
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 6e7556aa02e..fb9b02667e7 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -495,7 +495,6 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
                 u32 new_size = (bytenr - key->offset) >> blocksize_bits;
                 new_size *= csum_size;
                 ret = btrfs_truncate_item(trans, root, path, new_size, 1);
-                BUG_ON(ret);
         } else if (key->offset >= bytenr && csum_end > end_byte &&
                    end_byte > key->offset) {
                 /*
@@ -508,7 +507,6 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
                 new_size *= csum_size;
 
                 ret = btrfs_truncate_item(trans, root, path, new_size, 0);
-                BUG_ON(ret);
 
                 key->offset = end_byte;
                 ret = btrfs_set_item_key_safe(trans, root, path, key);
@@ -763,7 +761,6 @@ again:
                         goto insert;
 
                 ret = btrfs_extend_item(trans, root, path, diff);
-                BUG_ON(ret);
                 goto csum;
         }
 
diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c
index 64f1150bb48..baa74f3db69 100644
--- a/fs/btrfs/inode-item.c
+++ b/fs/btrfs/inode-item.c
@@ -130,7 +130,6 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
                               item_size - (ptr + sub_item_len - item_start));
         ret = btrfs_truncate_item(trans, root, path,
                                   item_size - sub_item_len, 1);
-        BUG_ON(ret);
 out:
         btrfs_free_path(path);
         return ret;
@@ -167,7 +166,6 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
 
                 old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
                 ret = btrfs_extend_item(trans, root, path, ins_len);
-                BUG_ON(ret);
                 ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
                                      struct btrfs_inode_ref);
                 ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 72650ceb982..e9e2b477827 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3428,7 +3428,6 @@ search_again:
                                     btrfs_file_extent_calc_inline_size(size);
                                 ret = btrfs_truncate_item(trans, root, path,
                                                           size, 1);
-                                BUG_ON(ret);
                         } else if (root->ref_cows) {
                                 inode_sub_bytes(inode, item_end + 1 -
                                                 found_key.offset);
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index cf2baeb7046..0350147106d 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -382,7 +382,6 @@ insert:
                 } else if (found_size < item_size) {
                         ret = btrfs_extend_item(trans, root, path,
                                                 item_size - found_size);
-                        BUG_ON(ret);
                 }
         } else if (ret) {
                 return ret;