Messages in this thread | | | From | Ming Lei <> | Date | Mon, 9 Nov 2020 17:57:37 +0800 | Subject | Re: 5.10 tree fails to build |
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On Thu, Nov 5, 2020 at 12:58 PM Amy Parker <enbyamy@gmail.com> wrote: > > On all attempts to build the 5.10 tree (from either release candidate, > Linus's tree, Greg's tree, etc), the build crashes on the BTFID vmlinux > stage. I've tested this on several different devices with completely > different hardware and kernel configs. The symbol for vfs_getattr > appears to be missing. Compiles for all of these work on any compile > on any 5.9 tree. I've tested all 4 5.9 dot-releases as well as the first > two and last two release candidates and Greg's staging tree. > > The specific error is: > BTFIDS vmlinux > FAILED unresolved symbol vfs_getattr > make: *** [Makefile:1164: vmlinux] Error 255 > > Any thoughts as to what's causing this? The main machine I'm > compiling with is running kernel 5.8.17 with dwarves 1.17. My > kernel config is attached as `kernel_config`.
Turns out the issue is introduced in the following commit:
commit 6e22ab9da79343532cd3cde39df25e5a5478c692 Author: Jiri Olsa <jolsa@kernel.org> Date: Tue Aug 25 21:21:20 2020 +0200
bpf: Add d_path helper
The issue can be observed reliably when building kernel in Fedora 33 with F33's kernel config.
GCC: gcc version 10.2.1 20200826 (Red Hat 10.2.1-3) (GCC)
-- Ming Lei
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