linux-kernel - [PATCH v4 0/2] ARM: Convert to ARCH

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Date:   Tue, 18 Oct 2022 20:43:37 +0800
From:   Li Huafei <lihuafei1@...wei.com>
To:     <linux@...linux.org.uk>, <linus.walleij@...aro.org>
CC:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
        <jolsa@...nel.org>, <namhyung@...nel.org>, <will@...nel.org>,
        <arnd@...db.de>, <ardb@...nel.org>, <rmk+kernel@...linux.org.uk>,
        <geert+renesas@...der.be>, <nick.hawkins@....com>,
        <john@...ozen.org>, <mhiramat@...nel.org>, <lihuafei1@...wei.com>,
        <ast@...nel.org>, <thunder.leizhen@...wei.com>,
        <rostedt@...dmis.org>, <linyujun809@...wei.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>
Subject: [PATCH v4 0/2] ARM: Convert to ARCH_STACKWALK

This series mainly updates the ARM stack trace code to use the newer and
simpler arch_stack_walk() interface.

When Russell applied patch 1, the patch tracker complained of a minor
conflict with Lei Zhen's patch (see [1]). Lei Zhen's patch has been
merged into v6.1-rc1. Now rebase to v6.1-rc1 and resend this patch set.

Thanks!

[1] https://www.armlinux.org.uk/developer/patches/viewpatch.php?id=9235/1

v4:
 - Rebase to v6.1-rc1.
 - Fix commit log for patch 2: 'arch _stack_walk()' -> 'arch_stack_walk()'.
 - Remove the two bugfix patches that have been merged in:
    ARM: stacktrace: Skip frame pointer boundary check for call_with_stack()
    ARM: stacktrace: Avoid duplicate saving of exception PC value

v3 resend: https://lore.kernel.org/lkml/20220826074047.107357-1-lihuafei1@huawei.com/
 It's been a month since I sent the v3. Linus told me I needed to add the
 patch to Russell's patch tracker myself, rebase to v6.0-rc1 before that.
 Thanks Linus for the tip!

 Since commit af6f23b88e95 ("ARM/dma-mapping: use the generic versions of
 dma_to_phys/phys_to_dma by default") and commit ae626eb97376
 ("ARM/dma-mapping: use dma-direct unconditionally") modified
 arch/arm/Kconfig, there is a minor conflict with patch 4 when rebase.

v3: https://lore.kernel.org/lkml/20220727040022.139387-1-lihuafei1@huawei.com/
 - 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 (2):
  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 |   2 +-
 arch/arm/kernel/perf_callchain.c  |   9 +--
 arch/arm/kernel/return_address.c  |   8 +-
 arch/arm/kernel/stacktrace.c      | 119 +++++++++---------------------
 5 files changed, 44 insertions(+), 95 deletions(-)

-- 
2.17.1