<!> up-to-date: '''kernel 3.2.54'''. (Always read current kernel sources!) This topic has maintainer B) [[rfree]]

BuildId is the --build-id option for compiler/linker that result in unique Build ID number being added to the resulting binary like [[vmlinux]] into it's
[[vmlinux/asm-notes]] section.

https://fedoraproject.org/wiki/Releases/FeatureBuildId

To get rid of it e.g. to produce SameKernel builds, edit the main Makefile and change --build-id to =none, as done by the Mempo script in https://github.com/mempo/deterministic-kernel
the important part is
{{{
sed -i Makefile  -e 's/--build-id/--build-id=none/g' 
}}}
targeting the top-level Makefile (seems to work on amd64 builds on debian).

Perhaps certain architectures already remove this --build-id, or remove it along with removing entire .notes section, see [[vmlinux/asm-notes]]