[PATCH] Use __glibc_(un)likely instead __builtin_expect.

[Roland McGrath]

> I have not done a full review of the patch, but I am of the opinion
> that if you can show that the generated code is identical, then such a
> cleanup patch should be OK.  I'd like opinions from others from this
> though, so please wait for more reviews before you push this change.

If generated code is identical and source changes introduce no style
violations (missing whitespace, overlong lines), then it's fine.