[BZ#17090/17620/17621]: fix DTV race, assert, and DTV_SURPLUS Static TLS limit

[Szabolcs Nagy]

* Alexandre Oliva <aoliva@redhat.com> [2015-03-05 14:14:06 -0300]:
> On Mar  4, 2015, Alan Modra <amodra@gmail.com> wrote:
> 
> > On Wed, Mar 04, 2015 at 03:35:29PM +1030, Alan Modra wrote:
> >> As does nptl/tst-stack4 on x86_64 if tst-stack4mod.so is built with
> >> -mtls-dialect=gnu2.
> 
> > This on top of your patch gets me past the segfault in free().
> 
> Thanks.  I've put an equivalent fix into my local tree, for an updated
> version of the patch.
> 

note that nptl/tst-stack4 may fail on x86_64 without tlsdesc
you just need to amplify the probability a bit:

https://sourceware.org/bugzilla/show_bug.cgi?id=17918