APPLY
#define NULLB_DEVICE_ATTR(NAME, TYPE, APPLY) \
int (*apply_fn)(struct nullb_device *dev, TYPE new_value) = APPLY;\
APPLY(s_commit_interval);
APPLY(s_stripe);
APPLY(s_max_batch_time);
APPLY(s_min_batch_time);
APPLY(s_want_extra_isize);
APPLY(s_inode_readahead_blks);
APPLY(s_max_dir_size_kb);
APPLY(s_li_wait_mult);
APPLY(s_resgid);
APPLY(s_resuid);
APPLY(s_fc_debug_max_replay);