On Wed, Apr 04, 2007 at 10:10:50AM -0400, Alfred von Campe enlightened us:
My only gripe is that the gettid man page should not refer to _sycall0 at all since it is not defined and just show the syscall() syntax directly. I realize this is not a CentOS issue, but rather an upstream issue. I still think they dropped the ball on this one, and if I had a support contract I would file a bug.
You don't need a support contract to file a bugzilla. I would encourage you to do so and put in all the detail that you (and others?) have described on this list.
Matt