The patch titled Subject: Revert "selftests: error out if kernel header files are not yet built" has been added to the -mm mm-hotfixes-unstable branch. Its filename is revert-selftests-error-out-if-kernel-header-files-are-not-yet-built.patch
This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...
This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------ From: John Hubbard jhubbard@nvidia.com Subject: Revert "selftests: error out if kernel header files are not yet built" Date: Fri, 8 Dec 2023 18:01:44 -0800
This reverts commit 9fc96c7c19df ("selftests: error out if kernel header files are not yet built").
It turns out that requiring the kernel headers to be built as a prerequisite to building selftests, does not work in many cases. For example, Peter Zijlstra writes:
"My biggest beef with the whole thing is that I simply do not want to use 'make headers', it doesn't work for me.
I have a ton of output directories and I don't care to build tools into the output dirs, in fact some of them flat out refuse to work that way (bpf comes to mind)." [1]
Therefore, stop erroring out on the selftests build. Additional patches will be required in order to change over to not requiring the kernel headers.
[1] https://lore.kernel.org/20231208221007.GO28727@noisy.programming.kicks-ass.n...
Link: https://lkml.kernel.org/r/20231209020144.244759-1-jhubbard@nvidia.com Fixes: 9fc96c7c19df ("selftests: error out if kernel header files are not yet built") Signed-off-by: John Hubbard jhubbard@nvidia.com Cc: Anders Roxell anders.roxell@linaro.org Cc: Muhammad Usama Anjum usama.anjum@collabora.com Cc: David Hildenbrand david@redhat.com Cc: Peter Xu peterx@redhat.com Cc: Jonathan Corbet corbet@lwn.net Cc: Nathan Chancellor nathan@kernel.org Cc: Shuah Khan shuah@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
tools/testing/selftests/Makefile | 21 --------------- tools/testing/selftests/lib.mk | 40 ++--------------------------- 2 files changed, 4 insertions(+), 57 deletions(-)
--- a/tools/testing/selftests/lib.mk~revert-selftests-error-out-if-kernel-header-files-are-not-yet-built +++ a/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_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$${NOCOLOR}: missing kernel header files."; \ - echo "Please run this and try again:"; \ - echo; \ - echo " cd $(top_srcdir)"; \ - echo " make headers"; \ - echo; \ - exit 1; \ - fi - -.PHONY: kernel_header_files +all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
define RUN_TESTS BASE_DIR="$(selfdir)"; \ --- a/tools/testing/selftests/Makefile~revert-selftests-error-out-if-kernel-header-files-are-not-yet-built +++ a/tools/testing/selftests/Makefile @@ -155,12 +155,10 @@ ifneq ($(KBUILD_OUTPUT),) abs_objtree := $(realpath $(abs_objtree)) BUILD := $(abs_objtree)/kselftest KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include - KHDR_DIR := ${abs_objtree}/usr/include else BUILD := $(CURDIR) abs_srctree := $(shell cd $(top_srcdir) && pwd) KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include - KHDR_DIR := ${abs_srctree}/usr/include DEFAULT_INSTALL_HDR_PATH := 1 endif
@@ -174,7 +172,7 @@ export KHDR_INCLUDES # all isn't the first target in the file. .DEFAULT_GOAL := all
-all: kernel_header_files +all: @ret=1; \ for TARGET in $(TARGETS); do \ BUILD_TARGET=$$BUILD/$$TARGET; \ @@ -185,23 +183,6 @@ all: kernel_header_files ret=$$((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; \ _
Patches currently in -mm which might be from jhubbard@nvidia.com are
revert-selftests-error-out-if-kernel-header-files-are-not-yet-built.patch