if (bl->is_mapped) {
i = bl->buf_ring->tail - bl->head;
if (bl->is_mmap) {
- if (bl->buf_ring) {
- struct page *page;
-
- page = virt_to_head_page(bl->buf_ring);
- if (put_page_testzero(page))
- free_compound_page(page);
- bl->buf_ring = NULL;
- }
+ struct page *page;
+
+ page = virt_to_head_page(bl->buf_ring);
+ if (put_page_testzero(page))
+ free_compound_page(page);
+ bl->buf_ring = NULL;
bl->is_mmap = 0;
} else if (bl->buf_nr_pages) {
int j;