* build failure (BTFIDS) with CONFIG_NET && !CONFIG_INET
@ 2020-09-29 10:17 Michal Kubecek
2020-09-30 4:57 ` Yonghong Song
0 siblings, 1 reply; 2+ messages in thread
From: Michal Kubecek @ 2020-09-29 10:17 UTC (permalink / raw)
To: bpf; +Cc: netdev, linux-kernel, Yonghong Song
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.
Michal
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: build failure (BTFIDS) with CONFIG_NET && !CONFIG_INET
2020-09-29 10:17 build failure (BTFIDS) with CONFIG_NET && !CONFIG_INET Michal Kubecek
@ 2020-09-30 4:57 ` Yonghong Song
0 siblings, 0 replies; 2+ messages in thread
From: Yonghong Song @ 2020-09-30 4:57 UTC (permalink / raw)
To: Michal Kubecek, bpf; +Cc: netdev, linux-kernel
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
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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