[PATCH 0/2] HID: bpf: fix HID-BPF CI due to new compiler flags

[PATCH 0/2] HID: bpf: fix HID-BPF CI due to new compiler flags

[Benjamin Tissoires]

Since the merge with v6.19-rc my CI is broken because of the newly
enabled -fms-extensions.

Add the missing flags when generating the CFLAGS for bpf.o to solve this
and continue running the tests while applying the patches.

Cheers,
Benjamin

Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
---
Benjamin Tissoires (2):
      HID: bpf: fix bpf compilation with -fms-extensions
      selftests/hid: fix bpf compilations due to -fms-extensions

 drivers/hid/bpf/progs/Makefile       | 6 ++++--
 tools/testing/selftests/hid/Makefile | 2 ++
 2 files changed, 6 insertions(+), 2 deletions(-)
---
base-commit: fde4ce068d1bccacf1e2d6a28697a3847f28e0a6
change-id: 20260106-wip-fix-bpf-compilation-4707e0faacb1

Best regards,
-- 
Benjamin Tissoires <bentiss@kernel.org>

[PATCH 1/2] HID: bpf: fix bpf compilation with -fms-extensions

[Benjamin Tissoires]

Similar to commit 835a50753579 ("selftests/bpf: Add -fms-extensions to
bpf build flags") and commit 639f58a0f480 ("bpftool: Fix build warnings
due to MS extensions")

The kernel is now built with -fms-extensions, therefore
generated vmlinux.h contains types like:
struct slab {
   ..
   struct freelist_counters;
};

Use -fms-extensions and -Wno-microsoft-anon-tag flags
to build bpf programs that #include "vmlinux.h"

Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
---
 drivers/hid/bpf/progs/Makefile | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/bpf/progs/Makefile b/drivers/hid/bpf/progs/Makefile
index ec1fc642fd63..66b8f38e591d 100644
--- a/drivers/hid/bpf/progs/Makefile
+++ b/drivers/hid/bpf/progs/Makefile
@@ -56,8 +56,10 @@ clean:
 
 %.bpf.o: %.bpf.c vmlinux.h $(BPFOBJ) | $(OUTPUT)
 	$(call msg,BPF,$@)
-	$(Q)$(CLANG) -g -O2 --target=bpf -Wall -Werror $(INCLUDES)	      \
-		 -c $(filter %.c,$^) -o $@ &&				      \
+	$(Q)$(CLANG) -g -O2 --target=bpf -Wall -Werror $(INCLUDES)		\
+		     -Wno-microsoft-anon-tag					\
+		     -fms-extensions						\
+		     -c $(filter %.c,$^) -o $@ &&				\
 	$(LLVM_STRIP) -g $@
 
 vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)

-- 
2.52.0

[PATCH 2/2] selftests/hid: fix bpf compilations due to -fms-extensions

[Benjamin Tissoires]

Similar to commit 835a50753579 ("selftests/bpf: Add -fms-extensions to
bpf build flags") and commit 639f58a0f480 ("bpftool: Fix build warnings
due to MS extensions")

The kernel is now built with -fms-extensions, therefore
generated vmlinux.h contains types like:
struct slab {
   ..
   struct freelist_counters;
};

Use -fms-extensions and -Wno-microsoft-anon-tag flags
to build bpf programs that #include "vmlinux.h"

Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
---
 tools/testing/selftests/hid/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/hid/Makefile b/tools/testing/selftests/hid/Makefile
index 2839d2612ce3..50ec9e0406ab 100644
--- a/tools/testing/selftests/hid/Makefile
+++ b/tools/testing/selftests/hid/Makefile
@@ -184,6 +184,8 @@ MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
 
 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
 BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) 		\
+	     -Wno-microsoft-anon-tag                                    \
+	     -fms-extensions                                            \
 	     -I$(INCLUDE_DIR)
 
 CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \

-- 
2.52.0

Re: [PATCH 0/2] HID: bpf: fix HID-BPF CI due to new compiler flags

[Benjamin Tissoires]

On Tue, 06 Jan 2026 16:30:53 +0100, Benjamin Tissoires wrote:
> Since the merge with v6.19-rc my CI is broken because of the newly
> enabled -fms-extensions.
> 
> Add the missing flags when generating the CFLAGS for bpf.o to solve this
> and continue running the tests while applying the patches.
> 
> Cheers,
> Benjamin
> 
> [...]

Applied to hid/hid.git (for-6.19/upstream-fixes), thanks!

[1/2] HID: bpf: fix bpf compilation with -fms-extensions
      https://git.kernel.org/hid/hid/c/b7666c891cc7
[2/2] selftests/hid: fix bpf compilations due to -fms-extensions
      https://git.kernel.org/hid/hid/c/e03fb369b083

Cheers,
-- 
Benjamin Tissoires <bentiss@kernel.org>