MAX_DIR_HASH_DEPTH
if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
max_depth = MAX_DIR_HASH_DEPTH;
if (level + dir_level < MAX_DIR_HASH_DEPTH / 2)
if (level < MAX_DIR_HASH_DEPTH / 2)
if (unlikely(current_depth == MAX_DIR_HASH_DEPTH))
if (t > MAX_DIR_HASH_DEPTH)
#define MAX_DIR_BUCKETS BIT((MAX_DIR_HASH_DEPTH / 2) - 1)