nilfs2: convert nilfs_grab_buffer() to use a folio

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

Link: https://lkml.kernel.org/r/20231016201114.1928083-12-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/page.c b/fs/nilfs2/page.c
index b4e54d079b7d030aeb0a46af9a5b18ae4bc7b4ba..1c075bd906c90fff60410e684ccc406a831bb24e 100644 (file)
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -25,19 +25,19 @@
        (BIT(BH_Uptodate) | BIT(BH_Mapped) | BIT(BH_NILFS_Node) |       \
         BIT(BH_NILFS_Volatile) | BIT(BH_NILFS_Checked))
 
-static struct buffer_head *
-__nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index,
-                      int blkbits, unsigned long b_state)
+static struct buffer_head *__nilfs_get_folio_block(struct folio *folio,
+               unsigned long block, pgoff_t index, int blkbits,
+               unsigned long b_state)
 
 {
        unsigned long first_block;
-       struct buffer_head *bh;
+       struct buffer_head *bh = folio_buffers(folio);
 
-       if (!page_has_buffers(page))
-               create_empty_buffers(page, 1 << blkbits, b_state);
+       if (!bh)
+               bh = folio_create_empty_buffers(folio, 1 << blkbits, b_state);
 
        first_block = (unsigned long)index << (PAGE_SHIFT - blkbits);
-       bh = nilfs_page_get_nth_block(page, block - first_block);
+       bh = get_nth_bh(bh, block - first_block);
 
        touch_buffer(bh);
        wait_on_buffer(bh);
@@ -51,17 +51,17 @@ struct buffer_head *nilfs_grab_buffer(struct inode *inode,
 {
        int blkbits = inode->i_blkbits;
        pgoff_t index = blkoff >> (PAGE_SHIFT - blkbits);
-       struct page *page;
+       struct folio *folio;
        struct buffer_head *bh;
 
-       page = grab_cache_page(mapping, index);
-       if (unlikely(!page))
+       folio = filemap_grab_folio(mapping, index);
+       if (IS_ERR(folio))
                return NULL;
 
-       bh = __nilfs_get_page_block(page, blkoff, index, blkbits, b_state);
+       bh = __nilfs_get_folio_block(folio, blkoff, index, blkbits, b_state);
        if (unlikely(!bh)) {
-               unlock_page(page);
-               put_page(page);
+               folio_unlock(folio);
+               folio_put(folio);
                return NULL;
        }
        return bh;