Re: [PATCH 1/3] bpf: Don't check for current being NULL

[Alexei Starovoitov]

On Mon, Oct 16, 2017 at 11:18 AM, Richard Weinberger <richard@xxxxxx> wrote:
> current is never NULL.
>
> Signed-off-by: Richard Weinberger <richard@xxxxxx>
> ---
>  kernel/bpf/helpers.c | 12 ------------
>  1 file changed, 12 deletions(-)
>
> diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
> index 3d24e238221e..e8845adcd15e 100644
> --- a/kernel/bpf/helpers.c
> +++ b/kernel/bpf/helpers.c
> @@ -120,9 +120,6 @@ BPF_CALL_0(bpf_get_current_pid_tgid)
>  {
>         struct task_struct *task = current;
>
> -       if (unlikely(!task))
> -               return -EINVAL;
> -

really? in all context? including irq and nmi?