dax_write_cache_enabled
if (unlikely(!dax_write_cache_enabled(dax_dev)))
EXPORT_SYMBOL_GPL(dax_write_cache_enabled);
if (dax_write_cache_enabled(dax_dev))
return sprintf(buf, "%d\n", !!dax_write_cache_enabled(pmem->dax_dev));
bool dax_write_cache_enabled(struct dax_device *dax_dev);