mm,jfs: move write_one_page/folio_write_one to jfs

The last remaining user of folio_write_one through the write_one_page
wrapper is jfs, so move the functionality there and hard code the
call to metapage_writepage.

Note that the use of the pagecache by the JFS 'metapage' buffer cache
is a bit odd, and we could probably do without VM-level dirty tracking
at all, but that's a change for another time.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 2e8461c..961569c 100644 (file)
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -691,6 +691,35 @@ void grab_metapage(struct metapage * mp)
        unlock_page(mp->page);
 }
 
+static int metapage_write_one(struct page *page)
+{
+       struct folio *folio = page_folio(page);
+       struct address_space *mapping = folio->mapping;
+       struct writeback_control wbc = {
+               .sync_mode = WB_SYNC_ALL,
+               .nr_to_write = folio_nr_pages(folio),
+       };
+       int ret = 0;
+
+       BUG_ON(!folio_test_locked(folio));
+
+       folio_wait_writeback(folio);
+
+       if (folio_clear_dirty_for_io(folio)) {
+               folio_get(folio);
+               ret = metapage_writepage(page, &wbc);
+               if (ret == 0)
+                       folio_wait_writeback(folio);
+               folio_put(folio);
+       } else {
+               folio_unlock(folio);
+       }
+
+       if (!ret)
+               ret = filemap_check_errors(mapping);
+       return ret;
+}
+
 void force_metapage(struct metapage *mp)
 {
        struct page *page = mp->page;
@@ -700,8 +729,8 @@ void force_metapage(struct metapage *mp)
        get_page(page);
        lock_page(page);
        set_page_dirty(page);
-       if (write_one_page(page))
-               jfs_error(mp->sb, "write_one_page() failed\n");
+       if (metapage_write_one(page))
+               jfs_error(mp->sb, "metapage_write_one() failed\n");
        clear_bit(META_forcewrite, &mp->flag);
        put_page(page);
 }
@@ -746,9 +775,9 @@ void release_metapage(struct metapage * mp)
                set_page_dirty(page);
                if (test_bit(META_sync, &mp->flag)) {
                        clear_bit(META_sync, &mp->flag);
-                       if (write_one_page(page))
-                               jfs_error(mp->sb, "write_one_page() failed\n");
-                       lock_page(page); /* write_one_page unlocks the page */
+                       if (metapage_write_one(page))
+                               jfs_error(mp->sb, "metapage_write_one() failed\n");
+                       lock_page(page);
                }
        } else if (mp->lsn)     /* discard_metapage doesn't remove it */
                remove_from_logsync(mp);

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 0acb8e1..853184a 100644 (file)
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -1066,12 +1066,6 @@ static inline void folio_cancel_dirty(struct folio *folio)
 bool folio_clear_dirty_for_io(struct folio *folio);
 bool clear_page_dirty_for_io(struct page *page);
 void folio_invalidate(struct folio *folio, size_t offset, size_t length);
-int __must_check folio_write_one(struct folio *folio);
-static inline int __must_check write_one_page(struct page *page)
-{
-       return folio_write_one(page_folio(page));
-}
-
 int __set_page_dirty_nobuffers(struct page *page);
 bool noop_dirty_folio(struct address_space *mapping, struct folio *folio);
 

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 516b1aa..db79439 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2583,46 +2583,6 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc)
        return ret;
 }
 
-/**
- * folio_write_one - write out a single folio and wait on I/O.
- * @folio: The folio to write.
- *
- * The folio must be locked by the caller and will be unlocked upon return.
- *
- * Note that the mapping's AS_EIO/AS_ENOSPC flags will be cleared when this
- * function returns.
- *
- * Return: %0 on success, negative error code otherwise
- */
-int folio_write_one(struct folio *folio)
-{
-       struct address_space *mapping = folio->mapping;
-       int ret = 0;
-       struct writeback_control wbc = {
-               .sync_mode = WB_SYNC_ALL,
-               .nr_to_write = folio_nr_pages(folio),
-       };
-
-       BUG_ON(!folio_test_locked(folio));
-
-       folio_wait_writeback(folio);
-
-       if (folio_clear_dirty_for_io(folio)) {
-               folio_get(folio);
-               ret = mapping->a_ops->writepage(&folio->page, &wbc);
-               if (ret == 0)
-                       folio_wait_writeback(folio);
-               folio_put(folio);
-       } else {
-               folio_unlock(folio);
-       }
-
-       if (!ret)
-               ret = filemap_check_errors(mapping);
-       return ret;
-}
-EXPORT_SYMBOL(folio_write_one);
-
 /*
  * For address_spaces which do not use buffers nor write back.
  */