Commit 760ebc45746b ("perf lock contention: Add empty 'struct rq' to
satisfy libbpf 'runqueue' type verification") inadvertently created a
declaration of 'struct rq' that conflicted with a generated
vmlinux.h's:
```
util/bpf_skel/lock_contention.bpf.c:419:8: error: redefinition of 'rq'
struct rq {};
^
/tmp/perf/util/bpf_skel/.tmp/../vmlinux.h:45630:8: note: previous definition is here
struct rq {
^
1 error generated.
```
Fix the issue by moving the declaration to vmlinux.h. So this can't
happen again, bring back build support for generating vmlinux.h then
add build tests.
v2. Rebase on perf-tools-next. Add Andrii's acked-by. Add patch to
filter out kernels that lack a .BTF section and cause the build to
break.
Ian Rogers (4):
perf build: Add ability to build with a generated vmlinux.h
perf bpf: Move the declaration of struct rq
perf test: Add build tests for BUILD_BPF_SKEL
perf build: Filter out BTF sources without a .BTF section
tools/perf/Makefile.config | 4 +++
tools/perf/Makefile.perf | 33 ++++++++++++++++++-
tools/perf/tests/make | 4 +++
tools/perf/util/bpf_skel/.gitignore | 1 +
.../perf/util/bpf_skel/lock_contention.bpf.c | 2 --
.../util/bpf_skel/{ => vmlinux}/vmlinux.h | 10 ++++++
6 files changed, 51 insertions(+), 3 deletions(-)
rename tools/perf/util/bpf_skel/{ => vmlinux}/vmlinux.h (90%)
--
2.41.0.rc0.172.g3f132b7071-goog
