Re: [PATCH] mm,hwpoison: return -EBUSY when page already poisoned

Aili Yao
2021-02-26T02:53:46Z

Hi naoya,Oscar,david:
>
> > We could use some negative value (error code) to report the reported case,
> > then as you mentioned above, some callers need change to handle the
> > new case, and the same is true if you use some positive value.
> > My preference is -EHWPOISON, but other options are fine if justified well.
>
> -EHWPOISON seems like a good fit.
>
I am OK with the -EHWPOISON error code, But I have one doubt here:
When we return this -EHWPOISON error code, Does this means we have to add a new error code
to error-base.h or errno.h? Is this easy realized?

Thanks!
Aili Yao