Convert the raw_spinlock to rqspinlock to fix the possible deadlock in [1] for bpf lru map. Meanwhile, add the testcase for the deadlock.
Link: https://lore.kernel.org/bpf/CAEf4BzbTJCUx0D=zjx6+5m5iighwlzap94hnw36zmdhaf4-...@mail.gmail.com/[1] Menglong Dong (2): bpf: use rqspinlock for lru map selftests/bpf: test map deadlock caused by NMI kernel/bpf/bpf_lru_list.c | 47 +++--- kernel/bpf/bpf_lru_list.h | 5 +- .../selftests/bpf/prog_tests/map_deadlock.c | 134 ++++++++++++++++++ .../selftests/bpf/progs/map_deadlock.c | 52 +++++++ 4 files changed, 217 insertions(+), 21 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/map_deadlock.c create mode 100644 tools/testing/selftests/bpf/progs/map_deadlock.c -- 2.51.2
