diff mbox series

selftests/user_events: silence a clang warning: address of packed member

Message ID 20240505213523.60492-1-jhubbard@nvidia.com (mailing list archive)
State New
Headers show
Series selftests/user_events: silence a clang warning: address of packed member | expand

Commit Message

John Hubbard May 5, 2024, 9:35 p.m. UTC 
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(+)


base-commit: f462ae0edd3703edd6f22fe41d336369c38b884b
prerequisite-patch-id: b901ece2a5b78503e2fb5480f20e304d36a0ea27
diff mbox series

Patch

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