dax_zero_range
EXPORT_SYMBOL_GPL(dax_zero_range);
return dax_zero_range(inode, pos, blocksize - off, did_zero, ops);
return dax_zero_range(inode, from, length, NULL,
return dax_zero_range(inode, pos, len, did_zero,
int dax_zero_range(struct inode *inode, loff_t pos, loff_t len, bool *did_zero,