[PATCH 0/3] signal: kill the obsolete SIGNAL_UNKILLABLE check in complete_signal()

[Oleg Nesterov <oleg@redhat.com>]

On 11/05, Oleg Nesterov wrote:
>
> Cough... and on the second thought this patch needs v2. Sorry Andrew, please
> drop signal-kill-the-obsolete-signal_unkillable-check-in-complete_signal.patch
> I'll send the updated version.
>
> With this patch the parent namespace can use any fatal signal (not only SIGKILL)
> to kill the init process in container. I do not think this is actually bad, but
> in any case this should not silently come as a side effect. And this is not
> consistent with SIGNAL_UNKILLABLE/sig_kernel_only() check in get_signal().
>
> Most probably I will just resend this patch as 2/2, while 1/2 will change
> sig_task_ignored() because afaics it is not actually right too (albeit not
> really buggy).

So this replaces
signal-kill-the-obsolete-signal_unkillable-check-in-complete_signal.patch
2/3 is actually the same change, just the changelog was updated.

I'll try to send the cleanups tomorrow. sig_task_ignored() doesn't
look nice, sig_handler_ignored() must die, SIGNAL_UNKILLABLE checks
in sig_task_ignored() and get_signal() should be unified.

And to remind, we need to fix more problems I found yesterday.

Oleg.