reiserfs: Convert reiserfs_write_begin() to use a folio

Remove a few calls to compound_head().

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 2d558b2012eaa0fe5e250d7060f483fb4507a81a..33da519c9767f71411dada9418fb76e95edf1f92 100644 (file)
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2738,20 +2738,21 @@ static int reiserfs_write_begin(struct file *file,
                                struct page **pagep, void **fsdata)
 {
        struct inode *inode;
-       struct page *page;
+       struct folio *folio;
        pgoff_t index;
        int ret;
        int old_ref = 0;
 
        inode = mapping->host;
        index = pos >> PAGE_SHIFT;
-       page = grab_cache_page_write_begin(mapping, index);
-       if (!page)
-               return -ENOMEM;
-       *pagep = page;
+       folio = __filemap_get_folio(mapping, index, FGP_WRITEBEGIN,
+                       mapping_gfp_mask(mapping));
+       if (IS_ERR(folio))
+               return PTR_ERR(folio);
+       *pagep = &folio->page;
 
        reiserfs_wait_on_write_block(inode->i_sb);
-       fix_tail_page_for_writing(page);
+       fix_tail_page_for_writing(&folio->page);
        if (reiserfs_transaction_running(inode->i_sb)) {
                struct reiserfs_transaction_handle *th;
                th = (struct reiserfs_transaction_handle *)current->
@@ -2761,7 +2762,7 @@ static int reiserfs_write_begin(struct file *file,
                old_ref = th->t_refcount;
                th->t_refcount++;
        }
-       ret = __block_write_begin(page, pos, len, reiserfs_get_block);
+       ret = __block_write_begin(&folio->page, pos, len, reiserfs_get_block);
        if (ret && reiserfs_transaction_running(inode->i_sb)) {
                struct reiserfs_transaction_handle *th = current->journal_info;
                /*
@@ -2791,8 +2792,8 @@ static int reiserfs_write_begin(struct file *file,
                }
        }
        if (ret) {
-               unlock_page(page);
-               put_page(page);
+               folio_unlock(folio);
+               folio_put(folio);
                /* Truncate allocated blocks */
                reiserfs_truncate_failed_write(inode);
        }