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kbuild: error out on missing MODULE_LICENSE

Adrian Bunk suggested a build time check for
missing MODULE_LICENSE annotation in modules.
The build time check is fatal as we really
want this fixed for all modules.
In-tree modules should all have been fixed up by now.

Signed-off-by: Sam Ravnborg <>
Cc: Adrian Bunk <>
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commit eed7d2798ce7b78547106d0c3557a88251b413d0 1 parent b69d398
Sam Ravnborg authored
Showing with 4 additions and 0 deletions.
  1. +4 −0 scripts/mod/modpost.c
4 scripts/mod/modpost.c
@@ -1552,6 +1552,10 @@ static void read_symbols(char *modname)
license = get_modinfo(info.modinfo, info.modinfo_len, "license");
+ if (!license && !is_vmlinux(modname))
+ fatal("modpost: missing MODULE_LICENSE() in %s\n"
+ "see include/linux/module.h for "
+ "more information\n", modname);
while (license) {
if (license_is_gpl_compatible(license))
mod->gpl_compatible = 1;
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