data_free
void (*data_free)(const void *buf_free_ptr);
data->dbfs_file->data_free(data->buf_free_ptr);
.data_free = vfree,
.data_free = dbfs_diag0c_free,
.data_free = hypfs_sprp_free,
.data_free = diag2fc_free,
sb->data_free = be32_to_cpu(super->fs_tfree);
buf->f_bfree = sbi->data_free; /* free data blocks */
buf->f_bavail = sbi->data_free; /* free blocks for non-root */
__u32 data_free; /* # of free data blocks */
data_free(prop->val);
data_free(d2);
void data_free(struct data d);
data_free(blob);
data_free(strbuf);