btrfs: use rb_entry() instead of container_of

To make the code clearer, use rb_entry() instead of container_of() to
deal with rbtree.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index a426dc8..146b2dc 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -426,7 +426,7 @@ void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
        tm_root = &fs_info->tree_mod_log;
        for (node = rb_first(tm_root); node; node = next) {
                next = rb_next(node);
-               tm = container_of(node, struct tree_mod_elem, node);
+               tm = rb_entry(node, struct tree_mod_elem, node);
                if (tm->seq > min_seq)
                        continue;
                rb_erase(node, tm_root);
@@ -460,7 +460,7 @@ __tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm)
        tm_root = &fs_info->tree_mod_log;
        new = &tm_root->rb_node;
        while (*new) {
-               cur = container_of(*new, struct tree_mod_elem, node);
+               cur = rb_entry(*new, struct tree_mod_elem, node);
                parent = *new;
                if (cur->logical < tm->logical)
                        new = &((*new)->rb_left);
@@ -746,7 +746,7 @@ __tree_mod_log_search(struct btrfs_fs_info *fs_info, u64 start, u64 min_seq,
        tm_root = &fs_info->tree_mod_log;
        node = tm_root->rb_node;
        while (node) {
-               cur = container_of(node, struct tree_mod_elem, node);
+               cur = rb_entry(node, struct tree_mod_elem, node);
                if (cur->logical < start) {
                        node = node->rb_left;
                } else if (cur->logical > start) {
@@ -1326,7 +1326,7 @@ __tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct extent_buffer *eb,
                next = rb_next(&tm->node);
                if (!next)
                        break;
-               tm = container_of(next, struct tree_mod_elem, node);
+               tm = rb_entry(next, struct tree_mod_elem, node);
                if (tm->logical != first_tm->logical)
                        break;
        }