On Sat, May 18, 2019 at 01:07:15AM +0900, Masahiro Yamada wrote: > In the recent build test of linux-next, Stephen saw a build error > caused by a broken .tmp_versions/*.mod file: > > https://lkml.org/lkml/2019/5/13/991 > > drivers/net/phy/asix.ko and drivers/net/usb/asix.ko have the same > basename, and there is a race in generating .tmp_versions/asix.mod > > Kbuild has not checked this before, and it suddenly shows up with > obscure error message when this kind of race occurs. > > Non-unique module names cause various sort of problems, but it is > not trivial to catch them by eyes. > > Hence, this script. > > It checks not only real modules, but also built-in modules (i.e. > controlled by tristate CONFIG option, but currently compiled with =y). > Non-unique names for built-in modules also cause problems because > /sys/modules/ would fall over. > > I tested allmodconfig on the latest kernel, and it detected the > following: > > warning: same basename if the following are built as modules: > drivers/regulator/88pm800.ko > drivers/mfd/88pm800.ko > warning: same basename if the following are built as modules: > drivers/gpu/drm/bridge/adv7511/adv7511.ko > drivers/media/i2c/adv7511.ko > warning: same basename if the following are built as modules: > drivers/net/phy/asix.ko > drivers/net/usb/asix.ko > warning: same basename if the following are built as modules: > fs/coda/coda.ko > drivers/media/platform/coda/coda.ko > warning: same basename if the following are built as modules: > drivers/net/phy/realtek.ko > drivers/net/dsa/realtek.ko > > Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> > Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> > Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> > Reviewed-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> > Reviewed-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx> Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
