Re: [PATCH 4/6] improve sys_personality for compat architectures

[David Miller]

From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Wed, 3 Feb 2010 18:06:27 +0100

>> But if the consensus is that we should fix this properly I can
>> replace the patch with one introducing a compat_sys_personality
>> which only gets used for compat tasks.
> 
> Right now, sparc64 and powerpc64 use sys32_personality for both native
> and compat tasks, x86 never uses it and all others use it only for
> compat tasks. That seems more sensible if we keep this function at
> all.

If it only gets used for compat tasks, you can only switch in
one direction.  I think it needs to be handled for both compat
and non-compat tasks, in order to allow for that.

That's why powerpc64 and sparc64 do things the way they do,
I am pretty sure.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/