DL_DEBUG_UNUSED buggy, especially with vdso

[Andreas Jaeger]

On 04/05/2012 02:23 AM, David Miller wrote:
> From: David Miller<davem@davemloft.net>
> Date: Wed, 04 Apr 2012 02:22:59 -0400 (EDT)
>
>> From: David Miller<davem@davemloft.net>
>> Date: Tue, 03 Apr 2012 23:59:32 -0400 (EDT)
>>
>>> 2) Dealing with the PLT lazy eval issue.  We can't just pretend
>>>     LD_BIND_NOW is set because in this test case testobj1.so also
>>>     references a symbol 'foo' via the PLT which will be undefined
>>
>> And this addresses the PLT lazy eval issue.
>>
>> Any objections?
>
> I'm extremely confident in these two fixes, and they get unused dep
> analysis actually working again on all platforms.  Could someone
> please review them?

I tested on Linux/x86-64 and Linux/x86 as well and it passed the testsuite.

The two patches look fine to me, thanks!

Andreas
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