Add an option for those having the kernel headers pre-installed from a customised local tree.
In that case, neither download, nor extract, nor patch.
1 The files rh62*.patch are from the Red Hat 6.2 file glibc-2.1.3-28.src.rpm
2 I am trusting here that Red Hat's patches are appropriate for all CPU
3 types. If I'm wrong, just remove the offending patch...