Hi there. I am actually using kernel gentoo-sources (version 2.4.25) I have noticed that I had some issued building alsa-drivers because of the linux-headers. the point is that linux-headers in stable are at the version number 2.4.21 and the gentoo-sources are at the version 2.4.25 maybe you should upgrade linux-headers to 2.4.25 Reproducible: Sometimes Steps to Reproduce: 1. 2. 3.
There is a linux-headers-2.4.25 ebuild in portage, but it's keyword masked. You are free to add "x86" or "~x86" to it and test at your own leisure, but headers is one of those packages that is usually several versions behind in going stable (compared to the current kernel version). The reason is because after installing newer linux-headers, one usually has to recompile glibc to take advantage of any new features offered in the headers. If you do test it, please let us know of any issues you may discover. I'm running it on my x86 system at the moment, and need to find a patch for glibc for sparc64 with them, but beyond such, I haven't heard of anyone else testing (most seem to want to play with using linux-2.6 as their headers).
Ok thanks for the comments, This is more clear for me now
Not really a bug. Just the natural development things. It takes a little while until a sanitized set of kernel-headers appear.