On Fri, Feb 1, 2019 at 2:26 PM Masahiro Yamada
<yamada.masahiro@xxxxxxxxxxxxx> wrote:
>
> Unless CONFIG_DEBUG_SECTION_MISMATCH is enabled, modpost only shows
> the number of section mismatches.
>
> If you want to know the symbols causing the issue, you need to rebuild
> with CONFIG_DEBUG_SECTION_MISMATCH. It is tedious.
>
> I think it is fine to show annoying warning when a new section mismatch
> comes in.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> ---
Applied to linux-kbuild.
>
> scripts/Makefile.modpost | 1 -
> scripts/mod/modpost.c | 27 +++++----------------------
> 2 files changed, 5 insertions(+), 23 deletions(-)
>
> diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
> index c0b7f52..6b7f354 100644
> --- a/scripts/Makefile.modpost
> +++ b/scripts/Makefile.modpost
> @@ -77,7 +77,6 @@ modpost = scripts/mod/modpost \
> $(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \
> $(if $(KBUILD_EXTRA_SYMBOLS), $(patsubst %, -e %,$(KBUILD_EXTRA_SYMBOLS))) \
> $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
> - $(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S) \
> $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
> $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)
>
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index 26bf886..0b0d108 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -35,7 +35,6 @@ static int vmlinux_section_warnings = 1;
> static int warn_unresolved = 0;
> /* How a symbol is exported */
> static int sec_mismatch_count = 0;
> -static int sec_mismatch_verbose = 1;
> static int sec_mismatch_fatal = 0;
> /* ignore missing files */
> static int ignore_missing_files;
> @@ -1406,8 +1405,6 @@ static void report_sec_mismatch(const char *modname,
> char *prl_to;
>
> sec_mismatch_count++;
> - if (!sec_mismatch_verbose)
> - return;
>
> get_pretty_name(from_is_func, &from, &from_p);
> get_pretty_name(to_is_func, &to, &to_p);
> @@ -1655,9 +1652,7 @@ static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
>
> sec_mismatch_count++;
>
> - if (sec_mismatch_verbose)
> - report_extable_warnings(modname, elf, mismatch, r, sym,
> - fromsec, tosec);
> + report_extable_warnings(modname, elf, mismatch, r, sym, fromsec, tosec);
>
> if (match(tosec, mismatch->bad_tosec))
> fatal("The relocation at %s+0x%lx references\n"
> @@ -2433,7 +2428,7 @@ int main(int argc, char **argv)
> struct ext_sym_list *extsym_iter;
> struct ext_sym_list *extsym_start = NULL;
>
> - while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awE")) != -1) {
> + while ((opt = getopt(argc, argv, "i:I:e:mnsT:o:awE")) != -1) {
> switch (opt) {
> case 'i':
> kernel_read = optarg;
> @@ -2465,9 +2460,6 @@ int main(int argc, char **argv)
> case 's':
> vmlinux_section_warnings = 0;
> break;
> - case 'S':
> - sec_mismatch_verbose = 0;
> - break;
> case 'T':
> files_source = optarg;
> break;
> @@ -2525,18 +2517,9 @@ int main(int argc, char **argv)
> }
> if (dump_write)
> write_dump(dump_write);
> - if (sec_mismatch_count) {
> - if (!sec_mismatch_verbose) {
> - warn("modpost: Found %d section mismatch(es).\n"
> - "To see full details build your kernel with:\n"
> - "'make CONFIG_DEBUG_SECTION_MISMATCH=y'\n",
> - sec_mismatch_count);
> - }
> - if (sec_mismatch_fatal) {
> - fatal("modpost: Section mismatches detected.\n"
> - "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
> - }
> - }
> + if (sec_mismatch_count && sec_mismatch_fatal)
> + fatal("modpost: Section mismatches detected.\n"
> + "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
> free(buf.p);
>
> return err;
> --
> 2.7.4
>
--
Best Regards
Masahiro Yamada
