Re: [PATCH v4 3/3] cred: change keyctl_session_to_parent() to use task_work_add()

[David Howells <dhowells@redhat.com>]

Oleg Nesterov <oleg@redhat.com> wrote:

> -	int ret;
> +	struct cred *cred;
> +	int err;

There's no need to change ret to be err.  It produces slightly less churn if
you don't.

> +	err = -ENOMEM;
> +	newwork = kmalloc(sizeof(struct task_work), GFP_KERNEL);
> +	if (!newwork)
> +		goto error_keyring;

This passes unnecessarily through kfree(newwork).  Please add a new goto label
and go to that.

> -/*
> - * Replace a process's session keyring on behalf of one of its children when
> - * the target  process is about to resume userspace execution.
> - */

Please don't delete the banner comment saying what the function does.

> -void key_replace_session_keyring(void)
> +void key_change_session_keyring(struct task_work *twork)

There's no particular need to change the name of the function.

David