selftests: drop khdr make target

Drop the "khdr" make target as it fails when the build directory is a
sub-directory of the source tree.  Rely on the "headers_install"
target to have been run first instead.

For example, here's a typical error this patch is addressing:

  $ make O=build -j32 kselftest-gen_tar
  make[1]: Entering directory '/home/kernelci/linux/build'
  make --no-builtin-rules INSTALL_HDR_PATH=/home/kernelci/linux/build/usr \
          ARCH=x86 -C ../../.. headers_install
  make[3]: Entering directory '/home/kernelci/linux'
  Makefile:1022: ../scripts/Makefile.extrawarn: No such file or directory

The source directory is determined in the top-level Makefile as ".."
relatively to the "build" directory, but then the kselftest Makefile
switches to "-C ../../.." so "../scripts" then points one level higher
than the source tree e.g. "linux/../scripts" - which fails obviously.
There is no other use-case in the kernel tree where a sub-directory
Makefile tries to call a top-level make target, and it appears this
isn't really a valid thing to do.

Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 52e31437f1a39b0ef71bace8fb98b29e2a208fa5..bf792130052def46258b1296d3e34ec1ab8b1ee3 100644 (file)
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -151,30 +151,7 @@ export KHDR_INCLUDES
 # all isn't the first target in the file.
 .DEFAULT_GOAL := all
 
-# Install headers here once for all tests. KSFT_KHDR_INSTALL_DONE
-# is used to avoid running headers_install from lib.mk.
-# Invoke headers install with --no-builtin-rules to avoid circular
-# dependency in "make kselftest" case. In this case, second level
-# make inherits builtin-rules which will use the rule generate
-# Makefile.o and runs into
-# "Circular Makefile.o <- prepare dependency dropped."
-# and headers_install fails and test compile fails.
-#
-# O= KBUILD_OUTPUT cases don't run into this error, since main Makefile
-# invokes them as sub-makes and --no-builtin-rules is not necessary,
-# but doesn't cause any failures. Keep it simple and use the same
-# flags in both cases.
-# Local build cases: "make kselftest", "make -C" - headers are installed
-# in the default INSTALL_HDR_PATH usr/include.
-khdr:
-ifeq (1,$(DEFAULT_INSTALL_HDR_PATH))
-       $(MAKE) --no-builtin-rules ARCH=$(ARCH) -C $(top_srcdir) headers_install
-else
-       $(MAKE) --no-builtin-rules INSTALL_HDR_PATH=$(abs_objtree)/usr \
-               ARCH=$(ARCH) -C $(top_srcdir) headers_install
-endif
-
-all: khdr
+all:
        @ret=1;                                                 \
        for TARGET in $(TARGETS); do                            \
                BUILD_TARGET=$$BUILD/$$TARGET;                  \
@@ -274,4 +251,4 @@ clean:
                $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean;\
        done;
 
-.PHONY: khdr all run_tests hotplug run_hotplug clean_hotplug run_pstore_crash install clean gen_tar
+.PHONY: all run_tests hotplug run_hotplug clean_hotplug run_pstore_crash install clean gen_tar