commit 338d4f49d6f7114a017d294ccf7374df4f998edc
("arm64: kernel: Add support for Privileged Access Never") includes sysreg.h
into futex.h and uaccess.h. But, the inline assembly used by asm/sysreg.h is
incompatible with llvm so it will cause BPF samples build failure for ARM64.
Since sysreg.h is useless for BPF samples, just exclude it from Makefile via
defining __ASM_SYSREG_H.
Signed-off-by: Yang Shi <yang....@linaro.org>
---
samples/bpf/Makefile | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 79b4596..edd638b 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -67,10 +67,13 @@ HOSTLOADLIBES_lathist += -lelf
# point this to your LLVM backend with bpf support
LLC=$(srctree)/tools/bpf/llvm/bld/Debug+Asserts/bin/llc
+# asm/sysreg.h inline assmbly used by it is incompatible with llvm.
+# But, ehere is not easy way to fix it, so just exclude it since it is
+# useless for BPF samples.
$(obj)/%.o: $(src)/%.c
clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
- -D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \
+ -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value
-Wno-pointer-sign \
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
- -D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \
+ -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value
-Wno-pointer-sign \
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=asm -o
$@.s
--
2.0.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
