On Fri, Apr 23, 2021 at 07:55:28PM +0200, Michal Suchánek wrote: > On Fri, Apr 23, 2021 at 07:41:29AM -0700, Yonghong Song wrote: > > > > > > On 4/23/21 6:05 AM, Michal Suchánek wrote: > > > Hello, > > > > > > I see this build error in linux-next (config attached). > > > > > > [ 4939s] LD vmlinux > > > [ 4959s] BTFIDS vmlinux > > > [ 4959s] FAILED unresolved symbol cubictcp_state > > > [ 4960s] make[1]: *** > > > [/home/abuild/rpmbuild/BUILD/kernel-vanilla-5.12~rc8.next.20210422/linux-5.12-rc8-next-20210422/Makefile:1277: > > > vmlinux] Error 255 > > > [ 4960s] make: *** [../Makefile:222: __sub-make] Error 2 > > > > Looks like you have DYNAMIC_FTRACE config option enabled already. > > Could you try a later version of pahole? > > Is this requireent new? > > I have pahole 1.20, and master does build without problems. > > If newer version is needed can a check be added? With dwarves 1.21 some architectures are fixed and some report other missing symbol. Definitely an improvenent. I see some new type support was added so it makes sense if that type is used the new dwarves are needed. Thanks Michal