On Fri, Jun 17, 2022 at 4:58 AM Sami Tolvanen <samitolvanen@xxxxxxxxxx> wrote: > > Module object files can contain an undefined reference to __this_module, > which isn't resolved until we link the final .ko. The kernel doesn't > export this symbol, so ignore it in gen_autoksyms.sh. OK, I understand these two sentences. > This avoids an > unnecessary vmlinux rebuild with UNUSED_KSYMS_WHITELIST when we have a > symbol list that already contains all the module dependencies. > I do not understand how this can happen. Can you provide me steps to reproduce it? > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> > --- > scripts/gen_autoksyms.sh | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/scripts/gen_autoksyms.sh b/scripts/gen_autoksyms.sh > index faacf7062122..653fadbad302 100755 > --- a/scripts/gen_autoksyms.sh > +++ b/scripts/gen_autoksyms.sh > @@ -56,4 +56,7 @@ EOT > # point addresses. > sed -e 's/^\.//' | > sort -u | > +# Ignore __this_module. It's not an exported symbol, and will be resolved > +# when the final .ko's are linked. > +grep -v '^__this_module$' | > sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file" > -- > 2.36.1.476.g0c4daa206d-goog > -- Best Regards Masahiro Yamada
