NFS: Update getacl to use xdr_set_scratch_folio()

Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>

Author: Anna Schumaker

fs/nfs/nfs4proc.c

@@ -6160,7 +6160,7 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf,
 	}
 
 	/* for decoding across pages */
-	res.acl_scratch = alloc_page(GFP_KERNEL);
+	res.acl_scratch = folio_alloc(GFP_KERNEL, 0);
 	if (!res.acl_scratch)
 		goto out_free;
 
@@ -6196,7 +6196,7 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf,
 	while (--i >= 0)
 		__free_page(pages[i]);
 	if (res.acl_scratch)
-		__free_page(res.acl_scratch);
+		folio_put(res.acl_scratch);
 	kfree(pages);
 	return ret;
 }

fs/nfs/nfs4xdr.c

@@ -6585,7 +6585,7 @@ nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
 	int status;
 
 	if (res->acl_scratch != NULL)
-		xdr_set_scratch_page(xdr, res->acl_scratch);
+		xdr_set_scratch_folio(xdr, res->acl_scratch);
 	status = decode_compound_hdr(xdr, &hdr);
 	if (status)
 		goto out;

include/linux/nfs_xdr.h

@@ -862,7 +862,7 @@ struct nfs_getaclres {
 	size_t				acl_len;
 	size_t				acl_data_offset;
 	int				acl_flags;
-	struct page *			acl_scratch;
+	struct folio *			acl_scratch;
 };
 
 struct nfs_setattrres {