PowerPC: gettimeofday optimization by using IFUNC

[Adhemerval Zanella]

On 02/22/2013 05:18 PM, Andi Kleen wrote:
> Adhemerval Zanella <azanella@linux.vnet.ibm.com> writes:
>
>> Hi,
>>
>> This patch make gettimeofday uses IFUNC and optimizing its call by avoid
>> the unnecessary way through glibc's internal __gettimeofday. Any tips,
>> advices, comments?
> Very nice optimizations. The extra round trip always annoyed me.  And
> using IFUNC for it is a nice trick.  Is it possible to do on x86 too?
>
The x86_64 code already has the optimization, but afaik x86 does not provide
a vdso (well, at least I couldn't see any on a 3.2 kernel, correct me if I'm
wrong).