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Subject[PATCH backport for 4.19] selftests: Fix test errors related to lib.mk khdr target
Date
From: Shuah Khan <shuah@kernel.org>

Upstream commit 211929fd3f7c ("selftests: Fix test errors related to
lib.mk khdr target")

This backport drops change to test that isn't in 4.19
- tools/testing/selftests/tc-testing/bpf/Makefile

The rest of the changes applied with minor changes to
- tools/testing/selftests/gpio/Makefile
- tools/testing/selftests/kvm/Makefile

Commit b2d35fa5fc80 ("selftests: add headers_install to lib.mk") added
khdr target to run headers_install target from the main Makefile. The
logic uses KSFT_KHDR_INSTALL and top_srcdir as controls to initialize
variables and include files to run headers_install from the top level
Makefile. There are a few problems with this logic.

1. Exposes top_srcdir to all tests
2. Common logic impacts all tests
3. Uses KSFT_KHDR_INSTALL, top_srcdir, and khdr in an adhoc way. Tests
add "khdr" dependency in their Makefiles to TEST_PROGS_EXTENDED in
some cases, and STATIC_LIBS in other cases. This makes this framework
confusing to use.

The common logic that runs for all tests even when KSFT_KHDR_INSTALL
isn't defined by the test. top_srcdir is initialized to a default value
when test doesn't initialize it. It works for all tests without a sub-dir
structure and tests with sub-dir structure fail to build.

e.g: make -C sparc64/drivers/ or make -C drivers/dma-buf

../../lib.mk:20: ../../../../scripts/subarch.include: No such file or directory
make: *** No rule to make target '../../../../scripts/subarch.include'. Stop.

There is no reason to require all tests to define top_srcdir and there is
no need to require tests to add khdr dependency using adhoc changes to
TEST_* and other variables.

Fix it with a consistent use of KSFT_KHDR_INSTALL and top_srcdir from tests
that have the dependency on headers_install.

Change common logic to include khdr target define and "all" target with
dependency on khdr when KSFT_KHDR_INSTALL is defined.

Only tests that have dependency on headers_install have to define just
the KSFT_KHDR_INSTALL, and top_srcdir variables and there is no need to
specify khdr dependency in the test Makefiles.

Fixes: b2d35fa5fc80 ("selftests: add headers_install to lib.mk")
Signed-off-by: Shuah Khan <shuah@kernel.org>
---
tools/testing/selftests/android/Makefile | 2 +-
tools/testing/selftests/futex/functional/Makefile | 1 +
tools/testing/selftests/gpio/Makefile | 1 +
tools/testing/selftests/kvm/Makefile | 2 +-
tools/testing/selftests/lib.mk | 8 ++++----
tools/testing/selftests/networking/timestamping/Makefile | 1 +
tools/testing/selftests/vm/Makefile | 1 +
7 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/android/Makefile b/tools/testing/selftests/android/Makefile
index d9a725478375..72c25a3cb658 100644
--- a/tools/testing/selftests/android/Makefile
+++ b/tools/testing/selftests/android/Makefile
@@ -6,7 +6,7 @@ TEST_PROGS := run.sh

include ../lib.mk

-all: khdr
+all:
@for DIR in $(SUBDIRS); do \
BUILD_TARGET=$(OUTPUT)/$$DIR; \
mkdir $$BUILD_TARGET -p; \
diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
index ad1eeb14fda7..30996306cabc 100644
--- a/tools/testing/selftests/futex/functional/Makefile
+++ b/tools/testing/selftests/futex/functional/Makefile
@@ -19,6 +19,7 @@ TEST_GEN_FILES := \
TEST_PROGS := run.sh

top_srcdir = ../../../../..
+KSFT_KHDR_INSTALL := 1
include ../../lib.mk

$(TEST_GEN_FILES): $(HEADERS)
diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
index 4665cdbf1a8d..59ea4c461978 100644
--- a/tools/testing/selftests/gpio/Makefile
+++ b/tools/testing/selftests/gpio/Makefile
@@ -9,6 +9,7 @@ EXTRA_OBJS := ../gpiogpio-event-mon-in.o ../gpiogpio-event-mon.o
EXTRA_OBJS += ../gpiogpio-hammer-in.o ../gpiogpio-utils.o ../gpiolsgpio-in.o
EXTRA_OBJS += ../gpiolsgpio.o

+KSFT_KHDR_INSTALL := 1
include ../lib.mk

all: $(BINARIES)
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index ec32dad3c3f0..cc83e2fd3787 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -1,6 +1,7 @@
all:

top_srcdir = ../../../../
+KSFT_KHDR_INSTALL := 1
UNAME_M := $(shell uname -m)

LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/sparsebit.c
@@ -40,4 +41,3 @@ $(OUTPUT)/libkvm.a: $(LIBKVM_OBJ)

all: $(STATIC_LIBS)
$(TEST_GEN_PROGS): $(STATIC_LIBS)
-$(STATIC_LIBS):| khdr
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 0a8e75886224..8b0f16409ed7 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -16,18 +16,18 @@ 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))

+ifdef KSFT_KHDR_INSTALL
top_srcdir ?= ../../../..
include $(top_srcdir)/scripts/subarch.include
ARCH ?= $(SUBARCH)

-all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
-
.PHONY: khdr
khdr:
make ARCH=$(ARCH) -C $(top_srcdir) headers_install

-ifdef KSFT_KHDR_INSTALL
-$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES):| khdr
+all: khdr $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
+else
+all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
endif

.ONESHELL:
diff --git a/tools/testing/selftests/networking/timestamping/Makefile b/tools/testing/selftests/networking/timestamping/Makefile
index 14cfcf006936..c46c0eefab9e 100644
--- a/tools/testing/selftests/networking/timestamping/Makefile
+++ b/tools/testing/selftests/networking/timestamping/Makefile
@@ -6,6 +6,7 @@ TEST_PROGS := hwtstamp_config rxtimestamp timestamping txtimestamp
all: $(TEST_PROGS)

top_srcdir = ../../../../..
+KSFT_KHDR_INSTALL := 1
include ../../lib.mk

clean:
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index e94b7b14bcb2..dc68340a6a96 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -24,6 +24,7 @@ TEST_GEN_FILES += virtual_address_range

TEST_PROGS := run_vmtests

+KSFT_KHDR_INSTALL := 1
include ../lib.mk

$(OUTPUT)/userfaultfd: LDLIBS += -lpthread
--
2.17.1
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