bpf: fix missing bpf_check_uarg_tail_zero in BPF_PROG_TEST_RUN

Commit b0b9395d865e ("bpf: support input __sk_buff context in
BPF_PROG_TEST_RUN") started using bpf_check_uarg_tail_zero in
BPF_PROG_TEST_RUN. However, bpf_check_uarg_tail_zero is not defined
for !CONFIG_BPF_SYSCALL:

net/bpf/test_run.c: In function ‘bpf_ctx_init’:
net/bpf/test_run.c:142:9: error: implicit declaration of function ‘bpf_check_uarg_tail_zero’ [-Werror=implicit-function-declaration]
   err = bpf_check_uarg_tail_zero(data_in, max_size, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~

Let's not build net/bpf/test_run.c when CONFIG_BPF_SYSCALL is not set.

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: b0b9395d865e ("bpf: support input __sk_buff context in BPF_PROG_TEST_RUN")
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/bpf/Makefile b/net/bpf/Makefile
index 27b2992a0692..b0ca361742e4 100644
--- a/net/bpf/Makefile
+++ b/net/bpf/Makefile
@@ -1 +1 @@
-obj-y	:= test_run.o
+obj-$(CONFIG_BPF_SYSCALL)	:= test_run.o