On 9/29/20 3:17 AM, Michal Kubecek wrote:
Hello,
our builds of s390x for zfcpdump fail since 5.9-rc1 with
BTFIDS vmlinux
FAILED unresolved symbol tcp_timewait_sock
make[1]: ***
[/home/abuild/rpmbuild/BUILD/kernel-zfcpdump-5.9.rc7/linux-5.9-rc7/Makefile:1176:
vmlinux] Error 255
I believe this is caused by commit fce557bcef11 ("bpf: Make btf_sock_ids
global") and the problem is caused by a specific configuration which has
CONFIG_NET enabled but CONFIG_INET disabled. IIUC there will be no user
of struct tcp_timewait_sock but btf_ids will try to generate BTF info
for it.
Thanks for reporting! Will send a patch to fix the issue soon.
Michal
