Re: [PATCH v0 00/42] notifiers: Return an error when callback is already registered

Borislav Petkov
2021-11-08T14:24:39Z

On Mon, Nov 08, 2021 at 09:17:03AM -0500, Alan Stern wrote:
> What reason is there for moving the check into the callers? It seems
> like pointless churn. Why not add the error return code, change the
> WARN to pr_warn, and leave the callers as they are? Wouldn't that end
> up having exactly the same effect?
>
> For that matter, what sort of remedial action can a caller take if the
> return code is -EEXIST? Is there any point in forcing callers to check
> the return code if they can't do anything about it?

See my reply to Geert from just now:

https://lore.kernel.org/r/YYkyUEqcsOwQMb1S@zn.tnic

I guess I can add another indirection to notifier_chain_register() and
avoid touching all the call sites.

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

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