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Message-ID: <04a35122-5020-5ad9-7bdc-c17f9a27bf50@nvidia.com>
Date:   Mon, 10 Jul 2023 13:22:41 -0700
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Subject: Re: [PATCH] selftests: Fix arm64 test installation
Content-Language: en-US
To:     Mark Brown <broonie@kernel.org>, Shuah Khan <shuah@kernel.org>,
        "Andrew Morton" <akpm@linux-foundation.org>,
        Anders Roxell <anders.roxell@linaro.org>,
        Muhammad Usama Anjum <usama.anjum@collabora.com>
CC:     <linux-kselftest@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
References: <20230710-kselftest-fix-arm64-v1-1-48e872844f25@kernel.org>
From:   John Hubbard <jhubbard@nvidia.com>
In-Reply-To: <20230710-kselftest-fix-arm64-v1-1-48e872844f25@kernel.org>
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On 7/10/23 07:04, Mark Brown wrote:
> 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

OK, I borrowed an arm64 system and was able to reproduce the problem.

There are 30 or 50 other pre-existing arm64 selftest build failures which were
quite misleading at first, until I got into the "right" selftests mindset of,
"massive swaths of selftests are broken, deal with it". :)

Anyway, I can now see new hard failure that you reported:

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

Let me see if there is a quick fix for this, especially given that
every other subsystem is somehow avoiding this--it's probably easy, just
a sec...


thanks,
-- 
John Hubbard
NVIDIA

> 
> 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,