[PATCH 4/5] ovl: port ovl_copy_up_tmpfile() to cred guard

[Christian Brauner <brauner@kernel.org>]

Remove the complicated struct ovl_cu_creds dance and use our new copy up
cred guard.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 fs/overlayfs/copy_up.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 9acc1549d46d..2176903d4538 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -892,17 +892,17 @@ static int ovl_copy_up_tmpfile(struct ovl_copy_up_ctx *c)
 	struct inode *udir = d_inode(c->destdir);
 	struct dentry *temp, *upper;
 	struct file *tmpfile;
-	struct ovl_cu_creds cc;
 	int err;
 
-	err = ovl_prep_cu_creds(c->dentry, &cc);
-	if (err)
-		return err;
+	scoped_class(copy_up_creds, copy_up_creds, c->dentry) {
+		if (IS_ERR(copy_up_creds))
+			return PTR_ERR(copy_up_creds);
 
 		ovl_start_write(c->dentry);
 		tmpfile = ovl_do_tmpfile(ofs, c->workdir, c->stat.mode);
 		ovl_end_write(c->dentry);
-	ovl_revert_cu_creds(&cc);
+	}
+
 	if (IS_ERR(tmpfile))
 		return PTR_ERR(tmpfile);
 

-- 
2.47.3