Remove pre-2.2 Linux kernel support

[Ryan Arnold]

On Tue, 2012-05-08 at 19:46 +0000, Joseph S. Myers wrote:
> Current glibc is unlikely to work with any Linux kernel before 2.6.x,
> and it seems uncontroversial that support for kernels before 2.4.x is
> certainly no longer useful.
> 
> I propose this patch to remove compatibility code for kernels before
> 2.2.x as a first step in cleaning up the no-longer-useful old kernel
> support.  Tested x86.  Could the powerpc, sh and sparc maintainers
> test and review the changes to their architectures' code?  Because
> this patch with lots of reindentation may not be very readable, I've
> also attached a diff -w version.

I tested PowerPC (32) and PowerPC64 and don't notice any new failures
(except for conformtest make check failures, but I think those are
unrelated).

Ryan S. Arnold
IBM Linux Technology Center