clip_level
zstd_ws_mem_sizes[clip_level(level)] = max_size;
int i = clip_level(level);
if (clip_level(level) == workspace->level)
if (clip_level(workspace->req_level) == workspace->level) {
if (workspace->level == clip_level(ZSTD_BTRFS_MAX_LEVEL))
workspace->size = zstd_ws_mem_sizes[clip_level(level)];
workspace->level = clip_level(level);