linux-kernel - Re: [RFC PATCH for 4.15 14/14] Restartable sequences: Provide self-tests

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Date:   Tue, 17 Oct 2017 21:36:59 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Paul Turner <pjt@...gle.com>, Andrew Hunter <ahh@...gle.com>,
        Andy Lutomirski <luto@...capital.net>,
        Dave Watson <davejwatson@...com>,
        Josh Triplett <josh@...htriplett.org>,
        Will Deacon <will.deacon@....com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Russell King <linux@....linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andi Kleen <andi@...stfloor.org>, Chris Lameter <cl@...ux.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ben Maurer <bmaurer@...com>,
        rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        shuah <shuah@...nel.org>,
        linux-kselftest <linux-kselftest@...r.kernel.org>,
        linux-api <linux-api@...r.kernel.org>
Subject: Re: [RFC PATCH for 4.15 14/14] Restartable sequences: Provide self-tests

Mathieu Desnoyers <mathieu.desnoyers@...icios.com> writes:

> Hi Michael,
>
> With your changes integrated, both rseq and cpu-opv selftests fail to
> build if I pass e.g. -j32 to make.
>
> cd tools/testing/selftests/cpu-opv
>
> efficios@...pudjdev:~/git/linux-percpu-dev/tools/testing/selftests/cpu-opv$ make clean; make
> rm -f -r /home/efficios/git/linux-percpu-dev/tools/testing/selftests/cpu-opv/basic_cpu_opv_test   
> gcc -O2 -Wall -g -I./ -I../../../../usr/include/    basic_cpu_opv_test.c cpu-op.c cpu-op.h   -o basic_cpu_opv_test
>
> efficios@...pudjdev:~/git/linux-percpu-dev/tools/testing/selftests/cpu-opv$ make clean; make -j32
> rm -f -r /home/efficios/git/linux-percpu-dev/tools/testing/selftests/cpu-opv/basic_cpu_opv_test   
> gcc -O2 -Wall -g -I./ -I../../../../usr/include/    basic_cpu_opv_test.c cpu-op.c cpu-op.h   -o basic_cpu_opv_test
> gcc -O2 -Wall -g -I./ -I../../../../usr/include/    basic_cpu_opv_test.c  -o /home/efficios/git/linux-percpu-dev/tools/testing/selftests/cpu-opv/basic_cpu_opv_test
> /tmp/ccDthnqM.o: In function `test_memcpy_op':
> /home/efficios/git/linux-percpu-dev/tools/testing/selftests/cpu-opv/basic_cpu_opv_test.c:364: undefined reference to `cpu_op_get_current_cpu'
> /home/efficios/git/linux-percpu-dev/tools/testing/selftests/cpu-opv/basic_cpu_opv_test.c:365: undefined reference to `cpu_opv'
...
> make: *** [/home/efficios/git/linux-percpu-dev/tools/testing/selftests/cpu-opv/basic_cpu_opv_test] Error 1
> make: *** Waiting for unfinished jobs....
>
> Any idea what is going on here ?

Ugh sorry, yes.

New patch below should fix it. Tested with -j:

  ~/linux/tools/testing/selftests$ make TARGETS="rseq cpu-opv" -j
  make[1]: Entering directory '/home/michael/linux/tools/testing/selftests/rseq'
  gcc -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/    basic_test.c rseq.h rseq-ppc.h rseq-x86.h rseq-arm.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h -lpthread -o /home/michael/linux/tools/testing/selftests/rseq/basic_test
  gcc -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/    basic_percpu_ops_test.c rseq.h rseq-ppc.h rseq-x86.h rseq-arm.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h -lpthread -o /home/michael/linux/tools/testing/selftests/rseq/basic_percpu_ops_test
  gcc -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/    param_test.c rseq.h rseq-ppc.h rseq-x86.h rseq-arm.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h -lpthread -o /home/michael/linux/tools/testing/selftests/rseq/param_test
  make[1]: Leaving directory '/home/michael/linux/tools/testing/selftests/rseq'
  make[1]: Entering directory '/home/michael/linux/tools/testing/selftests/cpu-opv'
  gcc -O2 -Wall -g -I./ -I../../../../usr/include/    basic_cpu_opv_test.c cpu-op.c cpu-op.h  -o /home/michael/linux/tools/testing/selftests/cpu-opv/basic_cpu_opv_test
  make[1]: Leaving directory '/home/michael/linux/tools/testing/selftests/cpu-opv'
  ~/linux/tools/testing/selftests$ make TARGETS="rseq cpu-opv" clean
  make[1]: Entering directory '/home/michael/linux/tools/testing/selftests/rseq'
  rm -f -r /home/michael/linux/tools/testing/selftests/rseq/basic_test /home/michael/linux/tools/testing/selftests/rseq/basic_percpu_ops_test /home/michael/linux/tools/testing/selftests/rseq/param_test   
  make[1]: Leaving directory '/home/michael/linux/tools/testing/selftests/rseq'
  make[1]: Entering directory '/home/michael/linux/tools/testing/selftests/cpu-opv'
  rm -f -r /home/michael/linux/tools/testing/selftests/cpu-opv/basic_cpu_opv_test   
  make[1]: Leaving directory '/home/michael/linux/tools/testing/selftests/cpu-opv'
  ~/linux/tools/testing/selftests$ cd cpu-opv/
  ~/linux/tools/testing/selftests/cpu-opv$ make -j
  gcc -O2 -Wall -g -I./ -I../../../../usr/include/    basic_cpu_opv_test.c cpu-op.c cpu-op.h  -o /home/michael/linux/tools/testing/selftests/cpu-opv/basic_cpu_opv_test
  ~/linux/tools/testing/selftests/cpu-opv$ make clean
  rm -f -r /home/michael/linux/tools/testing/selftests/cpu-opv/basic_cpu_opv_test   
  ~/linux/tools/testing/selftests/cpu-opv$ cd ../rseq/
  ~/linux/tools/testing/selftests/rseq$ make -j
  gcc -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/    basic_test.c rseq.h rseq-ppc.h rseq-x86.h rseq-arm.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h -lpthread -o /home/michael/linux/tools/testing/selftests/rseq/basic_test
  gcc -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/    basic_percpu_ops_test.c rseq.h rseq-ppc.h rseq-x86.h rseq-arm.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h -lpthread -o /home/michael/linux/tools/testing/selftests/rseq/basic_percpu_ops_test
  gcc -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/    param_test.c rseq.h rseq-ppc.h rseq-x86.h rseq-arm.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h -lpthread -o /home/michael/linux/tools/testing/selftests/rseq/param_test
  ~/linux/tools/testing/selftests/rseq$ make clean
  rm -f -r /home/michael/linux/tools/testing/selftests/rseq/basic_test /home/michael/linux/tools/testing/selftests/rseq/basic_percpu_ops_test /home/michael/linux/tools/testing/selftests/rseq/param_test   



cheers

diff --git a/tools/testing/selftests/cpu-opv/Makefile b/tools/testing/selftests/cpu-opv/Makefile
index 81d0596824ee..d27bd0f74deb 100644
--- a/tools/testing/selftests/cpu-opv/Makefile
+++ b/tools/testing/selftests/cpu-opv/Makefile
@@ -1,13 +1,7 @@
 CFLAGS += -O2 -Wall -g -I./ -I../../../../usr/include/
-LDFLAGS += -lpthread
 
-TESTS = basic_cpu_opv_test
-
-all: $(TESTS)
-%: %.c cpu-op.c cpu-op.h
-       $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+TEST_GEN_PROGS = basic_cpu_opv_test
 
 include ../lib.mk
 
-clean:
-       $(RM) $(TESTS)
+$(TEST_GEN_PROGS): cpu-op.c cpu-op.h
diff --git a/tools/testing/selftests/rseq/Makefile b/tools/testing/selftests/rseq/Makefile
index 7f0153556b80..7f625147b7fe 100644
--- a/tools/testing/selftests/rseq/Makefile
+++ b/tools/testing/selftests/rseq/Makefile
@@ -1,13 +1,8 @@
 CFLAGS += -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/
-LDFLAGS += -lpthread
+LDLIBS += -lpthread
 
-TESTS = basic_test basic_percpu_ops_test param_test
-
-all: $(TESTS)
-%: %.c rseq.h rseq-*.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h
-       $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+TEST_GEN_PROGS = basic_test basic_percpu_ops_test param_test
 
 include ../lib.mk
 
-clean:
-       $(RM) $(TESTS)
+$(TEST_GEN_PROGS): rseq.h rseq-*.h rseq.c ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h