btrfs: get fs_info from eb in btree_read_extent_buffer_pages

We can read fs_info from extent buffer and can drop it from the
parameters.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 64978fc36745ec8e5cdd96918cd7b064c9142cba..f7bfa73c254571e1c16554366fded69d1aab00fe 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -450,11 +450,11 @@ int btrfs_verify_level_key(struct btrfs_fs_info *fs_info,
  * @level:             expected level, mandatory check
  * @first_key:         expected key of first slot, skip check if NULL
  */
-static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
-                                         struct extent_buffer *eb,
+static int btree_read_extent_buffer_pages(struct extent_buffer *eb,
                                          u64 parent_transid, int level,
                                          struct btrfs_key *first_key)
 {
+       struct btrfs_fs_info *fs_info = eb->fs_info;
        struct extent_io_tree *io_tree;
        int failed = 0;
        int ret;
@@ -1097,7 +1097,7 @@ struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
        if (IS_ERR(buf))
                return buf;
 
-       ret = btree_read_extent_buffer_pages(fs_info, buf, parent_transid,
+       ret = btree_read_extent_buffer_pages(buf, parent_transid,
                                             level, first_key);
        if (ret) {
                free_extent_buffer_stale(buf);
@@ -4158,10 +4158,7 @@ void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info)
 int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level,
                      struct btrfs_key *first_key)
 {
-       struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root;
-       struct btrfs_fs_info *fs_info = root->fs_info;
-
-       return btree_read_extent_buffer_pages(fs_info, buf, parent_transid,
+       return btree_read_extent_buffer_pages(buf, parent_transid,
                                              level, first_key);
 }