Re: [PATCH v2 0/6] generic relative extable support

[Ard Biesheuvel]

On 5 January 2016 at 16:19, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote:
> There are currently four architectures (x86, ia64, alpha and s390) whose
> user-access exception tables are relative to the table entry address rather
> than absolute. Each of these architectures has its own search_extable() and
> sort_extable() implementation, which are not only mostly identical to each
> other, but also deviate very little from the generic absolute implementations
> in lib/extable.c that they override.
>
> So before making arm64 the fifth architecture that reimplements this, let's
> refactor the existing code so that all of these architectures use common code
> for searching and sorting the relative extables. Archs may set
> ARCH_HAS_RELATIVE_EXTABLE to indicate that the table consists of a pair of
> relative ints, and may define swap_ex_entry_fixup() if the fixup member needs
> special treatment in the swapping step of the sorting routine (such as alpha).
>

[...]

Now that I have collected acks for all the patches, I think this is
good to go in.

@Andrew: since this touches 5 different architectures, is this perhaps
something that could go in via your tree after -rc1?
(assuming that the s390 bugfix has been merged by then)

Thanks,
Ard.