Re: [PATCH v5] init: Disable defaults if init= fails

[Rusty Russell <rusty@rustcorp.com.au>]

Andy Lutomirski <luto@amacapital.net> writes:
> If a user puts init=/whatever on the command line and /whatever
> can't be run, then the kernel will try a few default options before
> giving up.  If init=/whatever came from a bootloader prompt, then
> this is unexpected but probably harmless.  On the other hand, if it
> comes from a script (e.g. a tool like virtme or perhaps a future
> kselftest script), then the fallbacks are likely to exist, but
> they'll do the wrong thing.  For example, they might unexpectedly
> invoke systemd.
>
> This makes a failure to run the specified init= process be fatal.
>
> As a temporary measure, users can set CONFIG_INIT_FALLBACK=y to
> preserve the old behavior.  If no one speaks up, we can remove that
> option entirely after a release or two.
>
> Signed-off-by: Andy Lutomirski <luto@amacapital.net>

Acked-by: Rusty Russell <rusty@rustcorp.com.au>

Andrew, please apply.

Thanks,
Rusty.