Add RISC-V USER_STACKTRACE support, and fix the fp alignment bug
in perf_callchain_user() by the way as Björn pointed out.

Changes in v3:
- Fix the fp alignment bug in perf_callchain_user().
- Remove the LTP message as Björn suggested.
- Add the userstack trace test info.

Jinjie Ruan (2):
  riscv: Fix fp alignment bug in perf_callchain_user()
  riscv: stacktrace: Add USER_STACKTRACE support

 arch/riscv/Kconfig                 |  1 +
 arch/riscv/kernel/perf_callchain.c | 46 ++----------------------------
 arch/riscv/kernel/stacktrace.c     | 43 ++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 43 deletions(-)

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2.34.1