On Wed, 7 Jul 2021 10:21:01 -0500 Justin Forbes <jmforbes@xxxxxxxxxxx> wrote: > > bpftool is a builreq, the failure there has to do with where you are > building it. You need bpftool from 5.13 to build a 5.14 snapshot. The > error is unclear, but that is the solution. This is actually a very > useful bit in that we will use that vmlinux.h to build kernel-tools > for Fedora. It is built in kernel for ELN. As I rebase stable Fedora > to 5.13, it will require a prebuild of kernel-tools for 5.13 followed > by the kernel build. I have bpftool-5.13.0-1.fc35.x86_64 installed, and that seems to have satisfied the buildrequire. I am also building perf, tools, headers, and devel, so that everything is in sync with the custom kernel. That used to work fine as late as 5.10 kernels. So, my takeaway is that this has changed, and I now need to enable the build of vmlinux.h. The error message I received was that bpftool could not find BFT. I infer from your response that turning on the build of bpf will remedy that. > Would need to know what link this is. I know perf messed up the > makefile and created a link in the wrong place. We don't package this > link, but our command to remove it wasn't looking in the right place. > Rather than fix this in spec, I sent a fix upstream which is applied > and waiting for the next Linus perf pull. > https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1237 but > you shouldn't be hitting that at all if you are doing a fedora build > which doesn't build perf. If it isn't that, let me know what it > actually is, since I am not seeing it in rawhide builds. But as I say above, I *am* building perf. So, this solves the second problem. I can wait for a fedora kernel that has the fix, or I can try to apply that patch manually. The main reason I'm doing this is that the Fedora kernel has the configuration option for the rtl2832 module turned on. That is to use it for its intended purpose, as a tuner, and that is reasonable. But, I use an rtl2832 as a source of atmospheric entropy. My daemon can't acquire it unless the rtl2832 is free, which it isn't with a stock Fedora kernel. The slimmed down size and reduced attack surface are just bonuses of building the custom kernel. Thanks for your help. _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
