ecryptfs: constify path

Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/ecryptfs/ecryptfs_kernel.h

@@ -506,7 +506,7 @@ ecryptfs_dentry_to_lower(struct dentry *dentry)
 	return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
 }
 
-static inline struct path *
+static inline const struct path *
 ecryptfs_dentry_to_lower_path(struct dentry *dentry)
 {
 	return &((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path;

fs/ecryptfs/file.c

@@ -33,7 +33,7 @@ static ssize_t ecryptfs_read_update_atime(struct kiocb *iocb,
 				struct iov_iter *to)
 {
 	ssize_t rc;
-	struct path *path;
+	const struct path *path;
 	struct file *file = iocb->ki_filp;
 
 	rc = generic_file_read_iter(iocb, to);

fs/ecryptfs/inode.c

@@ -317,7 +317,7 @@ static int ecryptfs_i_size_read(struct dentry *dentry, struct inode *inode)
 static struct dentry *ecryptfs_lookup_interpose(struct dentry *dentry,
 				     struct dentry *lower_dentry)
 {
-	struct path *path = ecryptfs_dentry_to_lower_path(dentry->d_parent);
+	const struct path *path = ecryptfs_dentry_to_lower_path(dentry->d_parent);
 	struct inode *inode, *lower_inode;
 	struct ecryptfs_dentry_info *dentry_info;
 	int rc = 0;

fs/ecryptfs/main.c

@@ -105,7 +105,7 @@ static int ecryptfs_init_lower_file(struct dentry *dentry,
 				    struct file **lower_file)
 {
 	const struct cred *cred = current_cred();
-	struct path *path = ecryptfs_dentry_to_lower_path(dentry);
+	const struct path *path = ecryptfs_dentry_to_lower_path(dentry);
 	int rc;
 
 	rc = ecryptfs_privileged_open(lower_file, path->dentry, path->mnt,