All callers now have a folio so we can pass one in and use the folio
APIs to support large folios as well as save instructions by eliminating
calls to compound_head().
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
fs/ext4/inode.c | 29 ++++++++++++++---------------
1 file changed, 14 insertions(+), 15 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index e8f2918fd854..8b91e325492f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2097,34 +2097,33 @@ static int ext4_writepage(struct page *page,
return ret;
}
-static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)
+static int mpage_submit_folio(struct mpage_da_data *mpd, struct folio *folio)
{
- int len;
+ size_t len;
loff_t size;
int err;
- BUG_ON(page->index != mpd->first_page);
- clear_page_dirty_for_io(page);
+ BUG_ON(folio->index != mpd->first_page);
+ folio_clear_dirty_for_io(folio);
/*
* We have to be very careful here! Nothing protects writeback path
* against i_size changes and the page can be writeably mapped into
* page tables. So an application can be growing i_size and writing
- * data through mmap while writeback runs. clear_page_dirty_for_io()
+ * data through mmap while writeback runs. folio_clear_dirty_for_io()
* write-protects our page in page tables and the page cannot get
- * written to again until we release page lock. So only after
- * clear_page_dirty_for_io() we are safe to sample i_size for
+ * written to again until we release folio lock. So only after
+ * folio_clear_dirty_for_io() we are safe to sample i_size for
* ext4_bio_write_page() to zero-out tail of the written page. We rely
* on the barrier provided by TestClearPageDirty in
- * clear_page_dirty_for_io() to make sure i_size is really sampled only
+ * folio_clear_dirty_for_io() to make sure i_size is really sampled only
* after page tables are updated.
*/
size = i_size_read(mpd->inode);
- if (page->index == size >> PAGE_SHIFT &&
+ len = folio_size(folio);
+ if (folio_pos(folio) + len > size &&
!ext4_verity_in_progress(mpd->inode))
len = size & ~PAGE_MASK;
- else
- len = PAGE_SIZE;
- err = ext4_bio_write_page(&mpd->io_submit, page, len);
+ err = ext4_bio_write_page(&mpd->io_submit, &folio->page, len);
if (!err)
mpd->wbc->nr_to_write--;
mpd->first_page++;
@@ -2238,7 +2237,7 @@ static int mpage_process_page_bufs(struct mpage_da_data *mpd,
} while (lblk++, (bh = bh->b_this_page) != head);
/* So far everything mapped? Submit the page for IO. */
if (mpd->map.m_len == 0) {
- err = mpage_submit_page(mpd, head->b_page);
+ err = mpage_submit_folio(mpd, head->b_folio);
if (err < 0)
return err;
}
@@ -2370,7 +2369,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)
if (err < 0 || map_bh)
goto out;
/* Page fully mapped - let IO run! */
- err = mpage_submit_page(mpd, &folio->page);
+ err = mpage_submit_folio(mpd, folio);
if (err < 0)
goto out;
}
@@ -2680,7 +2679,7 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
*/
if (!mpd->can_map) {
if (ext4_page_nomap_can_writeout(&folio->page)) {
- err = mpage_submit_page(mpd, &folio->page);
+ err = mpage_submit_folio(mpd, folio);
if (err < 0)
goto out;
} else {
--
2.35.1
