On Sun, May 3, 2020 at 3:29 AM Marek Behun <marek.behun@xxxxxx> wrote: > > Just to note how this breaks things: > > On OpenWRT this may happen > 1. make modules is run > - Module.symvers contains symbols from modules > 2. make Image/bzImage is run (as part of another OpenWRT make target) > - Module.symvers is rewritten to contain only vmlinux.o symbols > 3. external kernel modules try to build (wireguard, mac80211) > - this now fails because external modules may depend on symbols from > other modules and this information isn't in Module.symvers anymore > > Marek Is this a regression by a721588d9475 ? I can reproduce it even before that commit. $ git checkout a721588d^ HEAD is now at acf2a1397a68 kbuild: modpost: remove unnecessary dependency for __modpost $ make mrproper [ snip ] $ make defconfig [ snip] $ make -j24 modules [ snip ] $ cat Module.symvers 0x00000000 nf_log_dump_packet_common net/netfilter/nf_log_common EXPORT_SYMBOL_GPL 0x00000000 nf_log_l2packet net/netfilter/nf_log_common EXPORT_SYMBOL_GPL 0x00000000 nf_log_dump_sk_uid_gid net/netfilter/nf_log_common EXPORT_SYMBOL_GPL 0x00000000 nf_log_dump_tcp_header net/netfilter/nf_log_common EXPORT_SYMBOL_GPL 0x00000000 nf_log_dump_udp_header net/netfilter/nf_log_common EXPORT_SYMBOL_GPL $ make -j24 bzImage [ snip ] $ grep -v vmlinux Module.symvers [ nothing is printed. symbols from nf_log_common.ko are gone. ] I can change it, but this is a long-standing behavior, I think. -- Best Regards Masahiro Yamada
