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modpost: propagate W=1 build option to modpost

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"No build warning" is a strong requirement these days, so you must fix
all issues before enabling a new warning flag.

We often add a new warning to W=1 first so that the kbuild test robot
blocks new breakages.

This commit allows modpost to show extra warnings only when W=1
(or KBUILD_EXTRA_WARN=1) is given.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
This commit is contained in:
Masahiro Yamada
2023-06-06 18:41:59 +09:00
parent 7f8256ae0e
commit 20ff36856f
2 changed files with 7 additions and 1 deletions
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7
scripts/mod/modpost.c
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@@ -42,6 +42,8 @@ static bool allow_missing_ns_imports;
static bool error_occurred;
static bool extra_warn;
/*
* Cut off the warnings when there are too many. This typically occurs when
* vmlinux is missing. ('make modules' without building vmlinux.)
@@ -2199,7 +2201,7 @@ int main(int argc, char **argv)
LIST_HEAD(dump_lists);
struct dump_list *dl, *dl2;
while ((opt = getopt(argc, argv, "ei:mnT:o:awENd:")) != -1) {
while ((opt = getopt(argc, argv, "ei:mnT:o:aWwENd:")) != -1) {
switch (opt) {
case 'e':
external_module = true;
@@ -2224,6 +2226,9 @@ int main(int argc, char **argv)
case 'T':
files_source = optarg;
break;
case 'W':
extra_warn = true;
break;
case 'w':
warn_unresolved = true;
break;