[PATCH v3 0/4] ARM: Convert to ARCH_STACKWALK

[Li Huafei]

This series mainly updates the ARM stack trace code to use the newer and
simpler arch_stack_walk() interface (see patches 3 and 4). Two issues
were fixed before that (see patches 1 and 2).

v3:
 - According to the discussion with Linus and Russell in v1:
   - Add a comment about "regs[1]" in patch 2, and remove the
     unnecessary ternary operator in the initialization of
     "frame->ex_frame".
   - Remove the patch "ARM: stacktrace: Allow stack trace saving for
     non-current tasks", and keep the check for not being able to
     unwind non-current tasks (including tasks running on other CPUs)
     when CONFIG_SMP=y in patch 4.
 - Rebase to linux-5.19-rc8.

v2: https://lore.kernel.org/lkml/20220713110020.85511-1-lihuafei1@huawei.com/
 - As suggested by Mark, the commit logs for patch 4 and 5 were
   refined for easy review.

v1: https://lore.kernel.org/lkml/20220712021527.109921-1-lihuafei1@huawei.com/

Li Huafei (4):
  ARM: stacktrace: Skip frame pointer boundary check for
    call_with_stack()
  ARM: stacktrace: Avoid duplicate saving of exception PC value
  ARM: stacktrace: Make stack walk callback consistent with generic code
  ARM: stacktrace: Convert stacktrace to generic ARCH_STACKWALK

 arch/arm/Kconfig                  |   1 +
 arch/arm/include/asm/stacktrace.h |   8 +-
 arch/arm/kernel/perf_callchain.c  |   9 +-
 arch/arm/kernel/return_address.c  |   9 +-
 arch/arm/kernel/stacktrace.c      | 191 ++++++++++++++----------------
 arch/arm/lib/call_with_stack.S    |   2 +
 6 files changed, 110 insertions(+), 110 deletions(-)

-- 
2.17.1