The use of $$OUTPUT in the target shell commands resulted in an empty string followed by an absolute path for which mkdir failed: $ make -C tools/testing/selftests/futex make: Entering directory '/home/dvhart/source/linux/linux-pdx86/tools/testing/selftests/futex' Makefile:36: warning: overriding recipe for target 'clean' ../lib.mk:55: warning: ignoring old recipe for target 'clean' for DIR in functional; do \ BUILD_TARGET=$OUTPUT/$DIR; \ mkdir $BUILD_TARGET -p; \ make OUTPUT=$BUILD_TARGET -C $DIR all;\ done mkdir: cannot create directory ‘/functional’: Permission denied Replace $$OUTPUT with $(OUTPUT) when referring to the Makefile OUTPUT variable. The above make command now completes successfully. Fixes: a8ba798bc8ec ("selftests: enable O and KBUILD_OUTPUT") Signed-off-by: Darren Hart (VMware) <dvhart@xxxxxxxxxxxxx> Cc: linux-kselftest@xxxxxxxxxxxxxxx Cc: bamvor.zhangjian@xxxxxxxxxx Cc: Shuah Khan <shuah@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> # 4.10.x- --- tools/testing/selftests/futex/Makefile | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/futex/Makefile b/tools/testing/selftests/futex/Makefile index 653c5cd..c8095e6 100644 --- a/tools/testing/selftests/futex/Makefile +++ b/tools/testing/selftests/futex/Makefile @@ -8,7 +8,7 @@ include ../lib.mk all: for DIR in $(SUBDIRS); do \ - BUILD_TARGET=$$OUTPUT/$$DIR; \ + BUILD_TARGET=$(OUTPUT)/$$DIR; \ mkdir $$BUILD_TARGET -p; \ make OUTPUT=$$BUILD_TARGET -C $$DIR $@;\ done @@ -22,7 +22,7 @@ override define INSTALL_RULE install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) @for SUBDIR in $(SUBDIRS); do \ - BUILD_TARGET=$$OUTPUT/$$SUBDIR; \ + BUILD_TARGET=$(OUTPUT)/$$SUBDIR; \ mkdir $$BUILD_TARGET -p; \ $(MAKE) OUTPUT=$$BUILD_TARGET -C $$SUBDIR INSTALL_PATH=$(INSTALL_PATH)/$$SUBDIR install; \ done; @@ -34,7 +34,7 @@ endef clean: for DIR in $(SUBDIRS); do \ - BUILD_TARGET=$$OUTPUT/$$DIR; \ + BUILD_TARGET=$(OUTPUT)/$$DIR; \ mkdir $$BUILD_TARGET -p; \ make OUTPUT=$$BUILD_TARGET -C $$DIR $@;\ done -- 2.9.3 -- Darren Hart VMware Open Source Technology Center