Re: [PATCH v11 4/8] fork: Add USER_WORKER flag to ignore signals

[Linus Torvalds]

On Thu, Feb 2, 2023 at 3:25 PM Mike Christie
<michael.christie@xxxxxxxxxx> wrote:
>
> +       if (args->worker_flags & USER_WORKER_SIG_IGN)
> +               ignore_signals(p);

Same comment as for the other case.

There are real reasons to avoid bitfields:

 - you can't pass addresses to them around

 - it's easier to read or assign multiple fields in one go

 - they are horrible for ABI issues due to the exact bit ordering and
padding being very subtle

but none of those issues are relevant here, where it's a kernel-internal ABI.

All these use-cases seem to actually be testing one bit at a time, and
the "assignments" are structure initializers for which named bitfields
are actually perfect and just make the initializer more legible.

            Linus