Re: [PATCH] selftests: Fix test errors related to lib.mk khdr target

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On 12/13/18 1:00 PM, shuah@xxxxxxxxxx wrote:
From: Shuah Khan <shuah@xxxxxxxxxx>

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")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Shuah Khan <shuah@xxxxxxxxxx>

---

Looks reasonable to me. Commit 7e0cf1c983b5 ("selftests/powerpc: Fix Makefiles for headers_install change") probably should be redone after this change.

Reviewed-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>

  tools/testing/selftests/android/Makefile                 | 2 +-
  tools/testing/selftests/futex/functional/Makefile        | 1 +
  tools/testing/selftests/gpio/Makefile                    | 6 +++---
  tools/testing/selftests/kvm/Makefile                     | 2 +-
  tools/testing/selftests/lib.mk                           | 8 ++++----
  tools/testing/selftests/networking/timestamping/Makefile | 1 +
  tools/testing/selftests/tc-testing/bpf/Makefile          | 1 +
  tools/testing/selftests/vm/Makefile                      | 1 +
  8 files changed, 13 insertions(+), 9 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 46648427d537..07f572a1bd3f 100644
--- a/tools/testing/selftests/gpio/Makefile
+++ b/tools/testing/selftests/gpio/Makefile
@@ -10,8 +10,6 @@ TEST_PROGS_EXTENDED := gpio-mockup-chardev
  GPIODIR := $(realpath ../../../gpio)
  GPIOOBJ := gpio-utils.o
-include ../lib.mk
-
  all: $(TEST_PROGS_EXTENDED)
override define CLEAN
@@ -19,7 +17,9 @@ override define CLEAN
  	$(MAKE) -C $(GPIODIR) OUTPUT=$(GPIODIR)/ clean
  endef
-$(TEST_PROGS_EXTENDED):| khdr
+KSFT_KHDR_INSTALL := 1
+include ../lib.mk
+
  $(TEST_PROGS_EXTENDED): $(GPIODIR)/$(GPIOOBJ)
$(GPIODIR)/$(GPIOOBJ):
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 01a219229238..52bfe5e76907 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/ucall.c lib/sparsebit.c
@@ -44,7 +45,6 @@ $(OUTPUT)/libkvm.a: $(LIBKVM_OBJ)
all: $(STATIC_LIBS)
  $(TEST_GEN_PROGS): $(STATIC_LIBS)
-$(STATIC_LIBS):| khdr
cscope: include_paths = $(LINUX_TOOL_INCLUDE) $(LINUX_HDR_PATH) include lib ..
  cscope:
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/tc-testing/bpf/Makefile b/tools/testing/selftests/tc-testing/bpf/Makefile
index dc92eb271d9a..be5a5e542804 100644
--- a/tools/testing/selftests/tc-testing/bpf/Makefile
+++ b/tools/testing/selftests/tc-testing/bpf/Makefile
@@ -4,6 +4,7 @@ APIDIR := ../../../../include/uapi
  TEST_GEN_FILES = action.o
top_srcdir = ../../../../..
+KSFT_KHDR_INSTALL := 1
  include ../../lib.mk
CLANG ?= clang
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 6e67e726e5a5..e13eb6cc8901 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -25,6 +25,7 @@ TEST_GEN_FILES += virtual_address_range
TEST_PROGS := run_vmtests +KSFT_KHDR_INSTALL := 1
  include ../lib.mk
$(OUTPUT)/userfaultfd: LDLIBS += -lpthread





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