}
/*
- * Create the appropriate buffers when given a page for data area and
+ * Create the appropriate buffers when given a folio for data area and
* the size of each buffer.. Use the bh->b_this_page linked list to
* follow the buffers created. Return NULL if unable to create more
* buffers.
* The retry flag is used to differentiate async IO (paging, swapping)
* which may not fail from ordinary buffer allocations.
*/
-struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
- bool retry)
+struct buffer_head *folio_alloc_buffers(struct folio *folio, unsigned long size,
+ bool retry)
{
struct buffer_head *bh, *head;
gfp_t gfp = GFP_NOFS | __GFP_ACCOUNT;
if (retry)
gfp |= __GFP_NOFAIL;
- /* The page lock pins the memcg */
- memcg = page_memcg(page);
+ /* The folio lock pins the memcg */
+ memcg = folio_memcg(folio);
old_memcg = set_active_memcg(memcg);
head = NULL;
- offset = PAGE_SIZE;
+ offset = folio_size(folio);
while ((offset -= size) >= 0) {
bh = alloc_buffer_head(gfp);
if (!bh)
bh->b_size = size;
- /* Link the buffer to its page */
- set_bh_page(bh, page, offset);
+ /* Link the buffer to its folio */
+ folio_set_bh(bh, folio, offset);
}
out:
set_active_memcg(old_memcg);
goto out;
}
+EXPORT_SYMBOL_GPL(folio_alloc_buffers);
+
+struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
+ bool retry)
+{
+ return folio_alloc_buffers(page_folio(page), size, retry);
+}
EXPORT_SYMBOL_GPL(alloc_page_buffers);
static inline void
void folio_set_bh(struct buffer_head *bh, struct folio *folio,
unsigned long offset);
bool try_to_free_buffers(struct folio *);
+struct buffer_head *folio_alloc_buffers(struct folio *folio, unsigned long size,
+ bool retry);
struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size,
bool retry);
void create_empty_buffers(struct page *, unsigned long,