f2fs: Pass a folio to set_nid()

All callers have a folio, so pass it in.  Removes two calls to
compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Author: Matthew Wilcox (Oracle)

fs/f2fs/node.c

@@ -818,7 +818,7 @@ int f2fs_get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
 				goto release_pages;
 			}
 
-			set_nid(&parent->page, offset[i - 1], nids[i], i == 1);
+			set_nid(parent, offset[i - 1], nids[i], i == 1);
 			f2fs_alloc_nid_done(sbi, nids[i]);
 			done = true;
 		} else if (mode == LOOKUP_NODE_RA && i == level && level > 1) {
@@ -1017,7 +1017,7 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
 			ret = truncate_dnode(&rdn);
 			if (ret < 0)
 				goto out_err;
-			if (set_nid(&folio->page, i, 0, false))
+			if (set_nid(folio, i, 0, false))
 				dn->node_changed = true;
 		}
 	} else {
@@ -1031,7 +1031,7 @@ static int truncate_nodes(struct dnode_of_data *dn, unsigned int nofs,
 			rdn.nid = child_nid;
 			ret = truncate_nodes(&rdn, child_nofs, 0, depth - 1);
 			if (ret == (NIDS_PER_BLOCK + 1)) {
-				if (set_nid(&folio->page, i, 0, false))
+				if (set_nid(folio, i, 0, false))
 					dn->node_changed = true;
 				child_nofs += ret;
 			} else if (ret < 0 && ret != -ENOENT) {
@@ -1097,7 +1097,7 @@ static int truncate_partial_nodes(struct dnode_of_data *dn,
 		err = truncate_dnode(dn);
 		if (err < 0)
 			goto fail;
-		if (set_nid(&folios[idx]->page, i, 0, false))
+		if (set_nid(folios[idx], i, 0, false))
 			dn->node_changed = true;
 	}
 
@@ -1223,7 +1223,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from)
 		if (offset[1] == 0 && get_nid(&folio->page, offset[0], true)) {
 			folio_lock(folio);
 			BUG_ON(folio->mapping != NODE_MAPPING(sbi));
-			set_nid(&folio->page, offset[0], 0, true);
+			set_nid(folio, offset[0], 0, true);
 			folio_unlock(folio);
 		}
 		offset[1] = 0;

fs/f2fs/node.h

@@ -367,17 +367,17 @@ static inline bool IS_DNODE(const struct page *node_page)
 	return true;
 }
 
-static inline int set_nid(struct page *p, int off, nid_t nid, bool i)
+static inline int set_nid(struct folio *folio, int off, nid_t nid, bool i)
 {
-	struct f2fs_node *rn = F2FS_NODE(p);
+	struct f2fs_node *rn = F2FS_NODE(&folio->page);
 
-	f2fs_wait_on_page_writeback(p, NODE, true, true);
+	f2fs_folio_wait_writeback(folio, NODE, true, true);
 
 	if (i)
 		rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
 	else
 		rn->in.nid[off] = cpu_to_le32(nid);
-	return set_page_dirty(p);
+	return folio_mark_dirty(folio);
 }
 
 static inline nid_t get_nid(struct page *p, int off, bool i)