nilfs2: convert nilfs_mdt_get_frozen_buffer to use a folio

Remove a number of folio->page->folio conversions.

Link: https://lkml.kernel.org/r/20231016201114.1928083-15-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 11b7cf4acc92daa4a29c934631e7c6672b3ca8ce..7b754e6494d7558f0a1637c0797c194a0c3e53b0 100644 (file)
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -592,17 +592,19 @@ nilfs_mdt_get_frozen_buffer(struct inode *inode, struct buffer_head *bh)
 {
        struct nilfs_shadow_map *shadow = NILFS_MDT(inode)->mi_shadow;
        struct buffer_head *bh_frozen = NULL;
-       struct page *page;
+       struct folio *folio;
        int n;
 
-       page = find_lock_page(shadow->inode->i_mapping, bh->b_folio->index);
-       if (page) {
-               if (page_has_buffers(page)) {
+       folio = filemap_lock_folio(shadow->inode->i_mapping,
+                       bh->b_folio->index);
+       if (!IS_ERR(folio)) {
+               bh_frozen = folio_buffers(folio);
+               if (bh_frozen) {
                        n = bh_offset(bh) >> inode->i_blkbits;
-                       bh_frozen = nilfs_page_get_nth_block(page, n);
+                       bh_frozen = get_nth_bh(bh_frozen, n);
                }
-               unlock_page(page);
-               put_page(page);
+               folio_unlock(folio);
+               folio_put(folio);
        }
        return bh_frozen;
 }