diff mbox series

[bpf] samples/bpf: fix broken vmlinux path for VMLINUX_BTF

Message ID 20250120023027.160448-1-jinghao7@illinois.edu (mailing list archive)
State New
Delegated to: BPF
Headers show
Series [bpf] samples/bpf: fix broken vmlinux path for VMLINUX_BTF | expand

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Commit Message

Jinghao Jia Jan. 20, 2025, 2:30 a.m. UTC 
Commit 13b25489b6f8 ("kbuild: change working directory to external
module directory with M=") changed kbuild working directory of bpf
samples to $(srctree)/samples/bpf, which broke the vmlinux path for
VMLINUX_BTF, as the Makefile assumes the current work directory to be
$(srctree):

  Makefile:316: *** Cannot find a vmlinux for VMLINUX_BTF at any of "  /path/to/linux/samples/bpf/vmlinux", build the kernel or set VMLINUX_BTF like "VMLINUX_BTF=/sys/kernel/btf/vmlinux" or VMLINUX_H variable.  Stop.

Correctly refer to the kernel source directory using $(srctree).

Fixes: 13b25489b6f8 ("kbuild: change working directory to external module directory with M=")
Tested-by: Ruowen Qin <ruqin@redhat.com>
Signed-off-by: Jinghao Jia <jinghao7@illinois.edu>
---
 samples/bpf/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 96a05e70ace3..f97295724a14 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -307,7 +307,7 @@  $(obj)/$(TRACE_HELPERS): TPROGS_CFLAGS := $(TPROGS_CFLAGS) -D__must_check=
 
 VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux))				\
 		     $(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux))	\
-		     $(abspath ./vmlinux)
+		     $(abspath $(srctree)/vmlinux)
 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
 
 $(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)