When building with clang, via:
make LLVM=1 -C tools/testing/selftest
...clang warns about "taking address of packed member 'write_index' ". This is not particularly helpful, because the test code really wants to write to exactly this location, and if it ends up being unaligned, then the test won't work (and may segfault, depending on the CPU type).
If that ever comes up, it will be obvious and can be fixed. But all it's doing now is prevent a clean clang build, so disable the warning.
Signed-off-by: John Hubbard jhubbard@nvidia.com --- tools/testing/selftests/user_events/Makefile | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/tools/testing/selftests/user_events/Makefile b/tools/testing/selftests/user_events/Makefile index 10fcd0066203..617e94344711 100644 --- a/tools/testing/selftests/user_events/Makefile +++ b/tools/testing/selftests/user_events/Makefile @@ -1,5 +1,10 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += -Wl,-no-as-needed -Wall $(KHDR_INCLUDES) + +ifneq ($(LLVM),) + CFLAGS += -Wno-address-of-packed-member +endif + LDLIBS += -lrt -lpthread -lm
TEST_GEN_PROGS = ftrace_test dyn_test perf_test abi_test
base-commit: f462ae0edd3703edd6f22fe41d336369c38b884b prerequisite-patch-id: b901ece2a5b78503e2fb5480f20e304d36a0ea27