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-rw-r--r--fs/nilfs2/page.c53
1 files changed, 1 insertions, 52 deletions
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 1168059c7efd..b3b988c2018f 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -37,8 +37,7 @@
37 37
38#define NILFS_BUFFER_INHERENT_BITS \ 38#define NILFS_BUFFER_INHERENT_BITS \
39 ((1UL << BH_Uptodate) | (1UL << BH_Mapped) | (1UL << BH_NILFS_Node) | \ 39 ((1UL << BH_Uptodate) | (1UL << BH_Mapped) | (1UL << BH_NILFS_Node) | \
40 (1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Allocated) | \ 40 (1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Checked))
41 (1UL << BH_NILFS_Checked))
42 41
43static struct buffer_head * 42static struct buffer_head *
44__nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index, 43__nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index,
@@ -217,56 +216,6 @@ void nilfs_page_bug(struct page *page)
217} 216}
218 217
219/** 218/**
220 * nilfs_alloc_private_page - allocate a private page with buffer heads
221 *
222 * Return Value: On success, a pointer to the allocated page is returned.
223 * On error, NULL is returned.
224 */
225struct page *nilfs_alloc_private_page(struct block_device *bdev, int size,
226 unsigned long state)
227{
228 struct buffer_head *bh, *head, *tail;
229 struct page *page;
230
231 page = alloc_page(GFP_NOFS); /* page_count of the returned page is 1 */
232 if (unlikely(!page))
233 return NULL;
234
235 lock_page(page);
236 head = alloc_page_buffers(page, size, 0);
237 if (unlikely(!head)) {
238 unlock_page(page);
239 __free_page(page);
240 return NULL;
241 }
242
243 bh = head;
244 do {
245 bh->b_state = (1UL << BH_NILFS_Allocated) | state;
246 tail = bh;
247 bh->b_bdev = bdev;
248 bh = bh->b_this_page;
249 } while (bh);
250
251 tail->b_this_page = head;
252 attach_page_buffers(page, head);
253
254 return page;
255}
256
257void nilfs_free_private_page(struct page *page)
258{
259 BUG_ON(!PageLocked(page));
260 BUG_ON(page->mapping);
261
262 if (page_has_buffers(page) && !try_to_free_buffers(page))
263 NILFS_PAGE_BUG(page, "failed to free page");
264
265 unlock_page(page);
266 __free_page(page);
267}
268
269/**
270 * nilfs_copy_page -- copy the page with buffers 219 * nilfs_copy_page -- copy the page with buffers
271 * @dst: destination page 220 * @dst: destination page
272 * @src: source page 221 * @src: source page