[PATCH bpf-next v2 0/2] bpf: implement syscall command BPF_MAP_GET_NEXT_KEY for stacktrace map

[Yonghong Song]

The patch set implements bpf syscall command BPF_MAP_GET_NEXT_KEY
for stacktrace map. Patch #1 is the core implementation
and Patch #2 implements a bpf test at tools/testing/selftests/bpf
directory. Please see individual patch comments for details.

Changelog:
  v1 -> v2:
   - For invalid key (key pointer is non-NULL), sets next_key to be the first 
valid key.

Yonghong Song (2):
  bpf: implement syscall command BPF_MAP_GET_NEXT_KEY for stacktrace map
  tools/bpf: add a bpf selftest for stacktrace

 kernel/bpf/stackmap.c                             |  28 ++++-
 tools/testing/selftests/bpf/Makefile              |   2 +-
 tools/testing/selftests/bpf/test_progs.c          | 127 ++++++++++++++++++++++
 tools/testing/selftests/bpf/test_stacktrace_map.c |  62 +++++++++++
 4 files changed, 216 insertions(+), 3 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/test_stacktrace_map.c

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2.9.5