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Date: Tue, 29 Sep 2020 21:57:58 -0700 From: Yonghong Song <yhs@...com> To: Michal Kubecek <mkubecek@...e.cz>, <bpf@...r.kernel.org> CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org> Subject: Re: build failure (BTFIDS) with CONFIG_NET && !CONFIG_INET 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 >
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