Documentation/dev-tools/kselftest.rst says you can use the "TARGETS" variable on the make command line to run only tests targeted for a single subsystem:

$ make TARGETS="size timers" kselftest

A natural way to narrow down further to a particular test in a subsystem is to specify e.g., TEST_GEN_PROGS:

$ make TARGETS=net TEST_PROGS= TEST_GEN_PROGS=tun kselftest

However, this does not work well because the following statement in tools/testing/selftests/lib.mk gets ignored:

TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))

Add the override directive to make it and similar ones will be effective even when TEST_GEN_PROGS and similar variables are specified in the command line.

Signed-off-by: Akihiko Odaki akihiko.odaki@daynix.com --- tools/testing/selftests/lib.mk | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index d6edcfcb5be832ddee4c3d34b5ad221e9295f878..68116e51f97d62376c63f727ba3fd1f616c67562 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -93,9 +93,9 @@ TOOLS_INCLUDES := -isystem $(top_srcdir)/tools/include/uapi # TEST_PROGS are for test shell scripts. # TEST_CUSTOM_PROGS and TEST_PROGS will be run by common run_tests # and install targets. Common clean doesn't touch them. -TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS)) -TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED)) -TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES)) +override TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS)) +override TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED)) +override TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))

all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) \ $(if $(TEST_GEN_MODS_DIR),gen_mods_dir)

--- base-commit: dd83757f6e686a2188997cb58b5975f744bb7786 change-id: 20250306-lib-4ac9711c10a2

Best regards,