Comment 0 for bug 1840935

Commit a25d38b5 (bpf: relax verifier restriction on BPF_MOV | BPF_ALU)

Is causing bpf test compilation failure:
$ sudo make -C tools/testing/selftests TARGETS=bpf run_tests
make: Entering directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests'
make[1]: Entering directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf'
make -C ../../../lib/bpf OUTPUT=/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf/
make[2]: Entering directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/lib/bpf'
Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'
make[2]: Leaving directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/lib/bpf'
make -C ../../../lib/bpf OUTPUT=/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf/
make[2]: Entering directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/lib/bpf'
Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'
make[2]: Leaving directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/lib/bpf'
gcc -Wall -O2 -I../../../include/uapi -I../../../lib -I../../../../include/generated -I../../../include test_verifier.c /home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf/libbpf.a /home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf/cgroup_helpers.c -lcap -lelf -lrt -o /home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf/test_verifier
test_verifier.c:2173:4: error: ‘struct bpf_test’ has no member named ‘retval’
   .retval = 0,
    ^~~~~~
../lib.mk:121: recipe for target '/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf/test_verifier' failed
make[1]: *** [/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf/test_verifier] Error 1
make[1]: Leaving directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests/bpf'
Makefile:73: recipe for target 'all' failed
make: *** [all] Error 2
make: Leaving directory '/home/jenkins/ubuntu-gke-4.15-bionic/tools/testing/selftests'

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-1040-gke 4.15.0-1040.42
ProcVersionSignature: Ubuntu 4.15.0-1040.42-gke 4.15.18
Uname: Linux 4.15.0-1040-gke x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
Date: Wed Aug 21 15:09:32 2019
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-signed-gke-4.15
UpgradeStatus: No upgrade log present (probably fresh install)