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Date:   Fri, 22 Feb 2019 12:23:19 +0900
From:   Masahiro Yamada <>
To:     "David S . Miller" <>,,
        Guenter Roeck <>
Cc:     Masahiro Yamada <>,
        Song Liu <>,
        Alexei Starovoitov <>,
        Yonghong Song <>,,
        Martin KaFai Lau <>,
        Daniel Borkmann <>
Subject: [PATCH] bpfilter: re-add header search paths to tools include to fix build error

I thought header search paths to tools/include(/uapi) were unneeded,
but it looks like a build error occurs depending on the compiler.

Commit 303a339f30a9 ("bpfilter: remove extra header search paths for
bpfilter_umh") reintroduced the build error fixed by commit ae40832e53c3
("bpfilter: fix a build err").

Apology for the breakage, and thanks to Guenter for reporting this.

Fixes: 303a339f30a9 ("bpfilter: remove extra header search paths for bpfilter_umh")
Reported-by: Guenter Roeck <>
Signed-off-by: Masahiro Yamada <>


Sorry for bothering you, but
could you please test this with your compiler?

I am also using GCC 7.3, but my compiler cannot
reproduce the build error.

 net/bpfilter/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile
index 5d6c776..854395f 100644
--- a/net/bpfilter/Makefile
+++ b/net/bpfilter/Makefile
@@ -5,6 +5,7 @@
 hostprogs-y := bpfilter_umh
 bpfilter_umh-objs := main.o
+KBUILD_HOSTCFLAGS += -Itools/include/ -Itools/include/uapi
 HOSTCC := $(CC)

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