NFS: Make opened as optional argument in _nfs4_do_open

Check opened, only update it when non-NULL.
It's not needs define an unused value for the opened
when calling _nfs4_do_open.

v3, same as v2.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/nfs4file.c

@@ -27,7 +27,6 @@ nfs4_file_open(struct inode *inode, struct file *filp)
 	struct inode *dir;
 	unsigned openflags = filp->f_flags;
 	struct iattr attr;
-	int opened = 0;
 	int err;
 
 	/*
@@ -66,7 +65,7 @@ nfs4_file_open(struct inode *inode, struct file *filp)
 		nfs_sync_inode(inode);
 	}
 
-	inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, &attr, &opened);
+	inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, &attr, NULL);
 	if (IS_ERR(inode)) {
 		err = PTR_ERR(inode);
 		switch (err) {

fs/nfs/nfs4proc.c

@@ -2452,7 +2452,7 @@ static int _nfs4_do_open(struct inode *dir,
 			nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
 		}
 	}
-	if (opendata->file_created)
+	if (opened && opendata->file_created)
 		*opened |= FILE_CREATED;
 
 	if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
@@ -3562,7 +3562,6 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 	struct nfs4_label l, *ilabel = NULL;
 	struct nfs_open_context *ctx;
 	struct nfs4_state *state;
-	int opened = 0;
 	int status = 0;
 
 	ctx = alloc_nfs_open_context(dentry, FMODE_READ);
@@ -3572,7 +3571,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 	ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
 
 	sattr->ia_mode &= ~current_umask();
-	state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
+	state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
 	if (IS_ERR(state)) {
 		status = PTR_ERR(state);
 		goto out;