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From:   Mark Brown <broonie@kernel.org>
Date:   Mon, 10 Jul 2023 15:04:21 +0100
Subject: [PATCH] selftests: Fix arm64 test installation
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Message-Id: <20230710-kselftest-fix-arm64-v1-1-48e872844f25@kernel.org>
To:     Shuah Khan <shuah@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Anders Roxell <anders.roxell@linaro.org>,
        John Hubbard <jhubbard@nvidia.com>,
        Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc:     linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        Mark Brown <broonie@kernel.org>
Precedence: bulk

The recent change fc96c7c19df ("selftests: error out if kernel header
files are not yet built") to generate an error message when building
kselftests without having installed the headers is generating spurious
failures during the install step which breaks the arm64 selftests (and
only the arm64 selftests):

Emit Tests for arm64
make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1
make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1
make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1
make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1
make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1
make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1
make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1
make[4]: *** [Makefile:26: all] Error 2

Presumably the arm64 tests are doing something unusual in their build
setup which could be adjusted but I didn't immediately see it and since
this is having a serious impact on test coverage in automation let's
just revert for now.

This is causing failures in KernelCI with the command:

   make KBUILD_BUILD_USER=KernelCI FORMAT=.xz ARCH=arm64 HOSTCC=gcc CROSS_COMPILE=aarch64-linux-gnu- CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- CC="ccache aarch64-linux-gnu-gcc" O=/tmp/kci/linux/build -C/tmp/kci/linux -j10 kselftest-gen_tar

and also when building using tuxmake.

Full log: https://storage.kernelci.org/mainline/master/v6.5-rc1/arm64/defconfig/gcc-10/logs/kselftest.log

Fixes: 9fc96c7c19df ("selftests: error out if kernel header files are not yet built")
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 tools/testing/selftests/Makefile | 21 +--------------------
 tools/testing/selftests/lib.mk   | 40 +++-------------------------------------
 2 files changed, 4 insertions(+), 57 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 666b56f22a41..405683b8cb39 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -146,12 +146,10 @@ ifneq ($(KBUILD_OUTPUT),)
   abs_objtree := $(realpath $(abs_objtree))
   BUILD := $(abs_objtree)/kselftest
   KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
-  KHDR_DIR := ${abs_objtree}/usr/include
 else
   BUILD := $(CURDIR)
   abs_srctree := $(shell cd $(top_srcdir) && pwd)
   KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
-  KHDR_DIR := ${abs_srctree}/usr/include
   DEFAULT_INSTALL_HDR_PATH := 1
 endif
 
@@ -165,7 +163,7 @@ export KHDR_INCLUDES
 # all isn't the first target in the file.
 .DEFAULT_GOAL := all
 
-all: kernel_header_files
+all:
 	@ret=1;							\
 	for TARGET in $(TARGETS); do				\
 		BUILD_TARGET=$$BUILD/$$TARGET;			\
@@ -176,23 +174,6 @@ all: kernel_header_files
 		ret=$$((ret * $$?));				\
 	done; exit $$ret;
 
-kernel_header_files:
-	@ls $(KHDR_DIR)/linux/*.h >/dev/null 2>/dev/null;                          \
-	if [ $$? -ne 0 ]; then                                                     \
-            RED='\033[1;31m';                                                  \
-            NOCOLOR='\033[0m';                                                 \
-            echo;                                                              \
-            echo -e "$${RED}error$${NOCOLOR}: missing kernel header files.";   \
-            echo "Please run this and try again:";                             \
-            echo;                                                              \
-            echo "    cd $(top_srcdir)";                                       \
-            echo "    make headers";                                           \
-            echo;                                                              \
-	    exit 1;                                                                \
-	fi
-
-.PHONY: kernel_header_files
-
 run_tests: all
 	@for TARGET in $(TARGETS); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index d17854285f2b..05400462c779 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -44,26 +44,10 @@ endif
 selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
 top_srcdir = $(selfdir)/../../..
 
-ifeq ("$(origin O)", "command line")
-  KBUILD_OUTPUT := $(O)
+ifeq ($(KHDR_INCLUDES),)
+KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
 endif
 
-ifneq ($(KBUILD_OUTPUT),)
-  # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
-  # expand a shell special character '~'. We use a somewhat tedious way here.
-  abs_objtree := $(shell cd $(top_srcdir) && mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
-  $(if $(abs_objtree),, \
-    $(error failed to create output directory "$(KBUILD_OUTPUT)"))
-  # $(realpath ...) resolves symlinks
-  abs_objtree := $(realpath $(abs_objtree))
-  KHDR_DIR := ${abs_objtree}/usr/include
-else
-  abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_DIR := ${abs_srctree}/usr/include
-endif
-
-KHDR_INCLUDES := -isystem $(KHDR_DIR)
-
 # The following are built by lib.mk common compile rules.
 # TEST_CUSTOM_PROGS should be used by tests that require
 # custom build rule and prevent common build rule use.
@@ -74,25 +58,7 @@ 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))
 
-all: kernel_header_files $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) \
-     $(TEST_GEN_FILES)
-
-kernel_header_files:
-	@ls $(KHDR_DIR)/linux/*.h >/dev/null 2>/dev/null;                      \
-	if [ $$? -ne 0 ]; then                                                 \
-            RED='\033[1;31m';                                                  \
-            NOCOLOR='\033[0m';                                                 \
-            echo;                                                              \
-            echo -e "$${RED}error$${NOCOLOR}: missing kernel header files.";   \
-            echo "Please run this and try again:";                             \
-            echo;                                                              \
-            echo "    cd $(top_srcdir)";                                       \
-            echo "    make headers";                                           \
-            echo;                                                              \
-	    exit 1; \
-	fi
-
-.PHONY: kernel_header_files
+all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
 
 define RUN_TESTS
 	BASE_DIR="$(selfdir)";			\

---
base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5
change-id: 20230710-kselftest-fix-arm64-c023160018d7

Best regards,
-- 
Mark Brown <broonie@kernel.org>