Re: [PATCH v2 02/19] MIPS: Loongson64: separate loongson2ef/loongson64 code

From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: "chenhc@lemote.com" <chenhc@lemote.com>,
	Paul Burton <paul.burton@mips.com>
Cc: "linux-mips@vger.kernel.org" <linux-mips@vger.kernel.org>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"jason@lakedaemon.net" <jason@lakedaemon.net>,
	"maz@kernel.org" <maz@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"robh+dt@kernel.org" <robh+dt@kernel.org>,
	"mark.rutland@arm.co" <mark.rutland@arm.co>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Subject: Re: [PATCH v2 02/19] MIPS: Loongson64: separate loongson2ef/loongson64 code
Date: Wed, 18 Sep 2019 08:38:03 +0800	[thread overview]
Message-ID: <18392e2d-b0a2-518f-ad22-34a4aada0014@flygoat.com> (raw)
In-Reply-To: <20190910001248.few7zmxsrg72mdum@pburton-laptop>

08:12, 2019年9月10日, Paul Burton <paul.burton@mips.com>:

    Hi Jiaxun & Huacai,

    On Thu, Sep 05, 2019 at 10:42:59PM +0800, Jiaxun Yang wrote:

          As later model of GSx64 family processors including
        2-series-soc have
          similar design with initial loongson3a while loongson2e/f
        seems less
          identical, we separate loongson2e/f support code out of
        mach-loongson64
          to make our life easier.

          Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com
        <mailto:jiaxun.yang@flygoat.com>>

    I looked at applying the first 3 patches of this series to mips-next &
    squashed in the relevant defconfig updates, then was looking at applying
    Huacai's recent 3 patch series.

Hi Paul,
Thanks for your effort.
Please let Huacai's patches go first.

I'm going to make a delicated set for separate the code. Based on mips-next.

    One issue is that they conflict, but beyond that it showed me that this
    patch deletes kernel-entry-init.h entirely. Was that intentional? If so
    it should be a separate patch & it needs an explanation.

Yes, that's intentional, I'm going to explain them in sets later.

    Please could the two of you make it clear what branch & commit your
    patches are based upon? Ideally it should be the current head of the
    mips-next branch.

    Also Jiaxun, it's really hard to see whether this patch is making any
    functional changes in addition to the duplication & renaming. I think it
    would be much better to split this into a few steps across multiple
    commits, something like this:

    1) Copy the loongson64 directory to loongson2ef, and keep the copy as-is
        *except* for the removal of the loongson2ef/loongon-3 subdirectory.
        Delete loongson64/fuloong-2e & loongson64/lemote-2f.

    2) Now clean up the loongson64 directory by moving files up from the
        loongson-3 subdirectory.

    3) Now clean up code, removing #ifdef's etc that no longer make sense.

    Provide the -M & -C flags to git format-patch when generating your
    patches. --find-copies-harder might help with the first step, if it's
    practical to run.

    That way each commit will be easier to review, and issues like the
    deletion of kernel-entry-init.h will be easier to spot.

Got it!
--
Jiaxun

    For now I undid the whole thing. It's getting late in the cycle anyway,
    so this will probably be v5.5 material.

    Thanks,
         Paul

          ---
           arch/mips/Kbuild.platforms | 1 +
           arch/mips/Kconfig | 51 +++++--
           arch/mips/include/asm/bootinfo.h | 1 -
           .../mach-loongson2ef/cpu-feature-overrides.h | 45 +++++++
           .../cs5536/cs5536.h | 0
           .../cs5536/cs5536_mfgpt.h | 0
           .../cs5536/cs5536_pci.h | 0
           .../cs5536/cs5536_vsm.h | 0
           .../loongson2ef.h} | 29 +---
           .../machine.h | 6 -
           .../mc146818rtc.h | 5 +-
           .../mem.h | 6 +-
           arch/mips/include/asm/mach-loongson2ef/pci.h | 43 ++++++
           .../include/asm/mach-loongson2ef/spaces.h | 10 ++
           .../mach-loongson64/cpu-feature-overrides.h | 8 +-
           arch/mips/include/asm/mach-loongson64/irq.h | 7 +-
           .../asm/mach-loongson64/kernel-entry-init.h | 74 ----------
           .../include/asm/mach-loongson64/loongson64.h | 48 +++++++
           .../mips/include/asm/mach-loongson64/mmzone.h | 16 ---
           arch/mips/include/asm/mach-loongson64/pci.h | 41 +-----
           .../include/asm/mach-loongson64/workarounds.h | 4 +-
           arch/mips/loongson2ef/Kconfig | 93 +++++++++++++
           arch/mips/loongson2ef/Makefile | 18 +++
           arch/mips/loongson2ef/Platform | 32 +++++
           .../common/Makefile | 0
           .../common/bonito-irq.c | 2 +-
           .../common/cmdline.c | 2 +-
           .../common/cs5536/Makefile | 0
           .../common/cs5536/cs5536_acc.c | 0
           .../common/cs5536/cs5536_ehci.c | 0
           .../common/cs5536/cs5536_ide.c | 0
           .../common/cs5536/cs5536_isa.c | 0
           .../common/cs5536/cs5536_mfgpt.c | 0
           .../common/cs5536/cs5536_ohci.c | 0
           .../common/cs5536/cs5536_pci.c | 0
           .../common/early_printk.c | 2 +-
           arch/mips/loongson2ef/common/env.c | 71 ++++++++++
           .../{loongson64 => loongson2ef}/common/init.c | 7 +-
           .../{loongson64 => loongson2ef}/common/irq.c | 2 +-
           .../common/machtype.c | 3 +-
           .../{loongson64 => loongson2ef}/common/mem.c | 40 +-----
           .../{loongson64 => loongson2ef}/common/pci.c | 11 +-
           .../common/platform.c | 0
           .../{loongson64 => loongson2ef}/common/pm.c | 2 +-
           .../common/reset.c | 23 +---
           .../{loongson64 => loongson2ef}/common/rtc.c | 0
           .../common/serial.c | 37 +----
           .../common/setup.c | 2 +-
           .../{loongson64 => loongson2ef}/common/time.c | 2 +-
           .../common/uart_base.c | 10 +-
           .../fuloong-2e/Makefile | 0
           .../fuloong-2e/dma.c | 0
           .../fuloong-2e/irq.c | 2 +-
           .../fuloong-2e/reset.c | 2 +-
           .../lemote-2f/Makefile | 0
           .../lemote-2f/clock.c | 2 +-
           .../lemote-2f/dma.c | 0
           .../lemote-2f/ec_kb3310b.c | 0
           .../lemote-2f/ec_kb3310b.h | 0
           .../lemote-2f/irq.c | 2 +-
           .../lemote-2f/machtype.c | 2 +-
           .../lemote-2f/pm.c | 2 +-
           .../lemote-2f/reset.c | 2 +-
           arch/mips/loongson64/Kconfig | 126 +-----------------
           arch/mips/loongson64/Makefile | 23 +---
           arch/mips/loongson64/Platform | 26 +---
           .../loongson64/{loongson-3 => }/acpi_init.c | 3 +-
           .../loongson64/{loongson-3 => }/cop2-ex.c | 5 +-
           arch/mips/loongson64/{loongson-3 => }/dma.c | 6 +-
           arch/mips/loongson64/{common => }/env.c | 72 +++-------
           arch/mips/loongson64/{loongson-3 => }/hpet.c | 0
           arch/mips/loongson64/{loongson-3 => }/irq.c | 40 +++++-
           arch/mips/loongson64/loongson-3/Makefile | 11 --
           arch/mips/loongson64/{loongson-3 => }/numa.c | 4 +-
           arch/mips/loongson64/pci.c | 45 +++++++
           .../loongson64/{loongson-3 => }/platform.c | 0
           arch/mips/loongson64/reset.c | 58 ++++++++
           arch/mips/loongson64/setup.c | 91 +++++++++++++
           arch/mips/loongson64/{loongson-3 => }/smp.c | 4 +-
           arch/mips/loongson64/{loongson-3 => }/smp.h | 0
           arch/mips/oprofile/op_model_loongson2.c | 2 +-
           arch/mips/oprofile/op_model_loongson3.c | 2 +-
           arch/mips/pci/Makefile | 2 +-
           arch/mips/pci/fixup-fuloong2e.c | 2 +-
           arch/mips/pci/fixup-lemote2f.c | 2 +-
           arch/mips/pci/ops-loongson2.c | 2 +-
           arch/mips/pci/ops-loongson3.c | 2 +-
           drivers/cpufreq/loongson2_cpufreq.c | 2 +-
           drivers/gpio/gpio-loongson.c | 2 +-
           drivers/platform/mips/cpu_hwmon.c | 2 +-
           90 files changed, 720 insertions(+), 582 deletions(-)
           create mode 100644
        arch/mips/include/asm/mach-loongson2ef/cpu-feature-overrides.h
           rename arch/mips/include/asm/{mach-loongson64 =>
        mach-loongson2ef}/cs5536/cs5536.h (100%)
           rename arch/mips/include/asm/{mach-loongson64 =>
        mach-loongson2ef}/cs5536/cs5536_mfgpt.h (100%)
           rename arch/mips/include/asm/{mach-loongson64 =>
        mach-loongson2ef}/cs5536/cs5536_pci.h (100%)
           rename arch/mips/include/asm/{mach-loongson64 =>
        mach-loongson2ef}/cs5536/cs5536_vsm.h (100%)
           rename arch/mips/include/asm/{mach-loongson64/loongson.h =>
        mach-loongson2ef/loongson2ef.h} (91%)
           rename arch/mips/include/asm/{mach-loongson64 =>
        mach-loongson2ef}/machine.h (80%)
           rename arch/mips/include/asm/{mach-loongson64 =>
        mach-loongson2ef}/mc146818rtc.h (80%)
           rename arch/mips/include/asm/{mach-loongson64 =>
        mach-loongson2ef}/mem.h (86%)
           create mode 100644 arch/mips/include/asm/mach-loongson2ef/pci.h
           create mode 100644
        arch/mips/include/asm/mach-loongson2ef/spaces.h
           delete mode 100644
        arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
           create mode 100644
        arch/mips/include/asm/mach-loongson64/loongson64.h
           create mode 100644 arch/mips/loongson2ef/Kconfig
           create mode 100644 arch/mips/loongson2ef/Makefile
           create mode 100644 arch/mips/loongson2ef/Platform
           rename arch/mips/{loongson64 => loongson2ef}/common/Makefile
        (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/bonito-irq.c (97%)
           rename arch/mips/{loongson64 => loongson2ef}/common/cmdline.c
        (97%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/Makefile (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/cs5536_acc.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/cs5536_ehci.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/cs5536_ide.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/cs5536_isa.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/cs5536_mfgpt.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/cs5536_ohci.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/cs5536/cs5536_pci.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/early_printk.c (97%)
           create mode 100644 arch/mips/loongson2ef/common/env.c
           rename arch/mips/{loongson64 => loongson2ef}/common/init.c (90%)
           rename arch/mips/{loongson64 => loongson2ef}/common/irq.c (98%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/machtype.c (94%)
           rename arch/mips/{loongson64 => loongson2ef}/common/mem.c (72%)
           rename arch/mips/{loongson64 => loongson2ef}/common/pci.c (89%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/platform.c (100%)
           rename arch/mips/{loongson64 => loongson2ef}/common/pm.c (99%)
           rename arch/mips/{loongson64 => loongson2ef}/common/reset.c (77%)
           rename arch/mips/{loongson64 => loongson2ef}/common/rtc.c (100%)
           rename arch/mips/{loongson64 => loongson2ef}/common/serial.c
        (63%)
           rename arch/mips/{loongson64 => loongson2ef}/common/setup.c (97%)
           rename arch/mips/{loongson64 => loongson2ef}/common/time.c (96%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/common/uart_base.c (77%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/fuloong-2e/Makefile (100%)
           rename arch/mips/{loongson64 => loongson2ef}/fuloong-2e/dma.c
        (100%)
           rename arch/mips/{loongson64 => loongson2ef}/fuloong-2e/irq.c
        (98%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/fuloong-2e/reset.c (93%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/lemote-2f/Makefile (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/lemote-2f/clock.c (98%)
           rename arch/mips/{loongson64 => loongson2ef}/lemote-2f/dma.c
        (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/lemote-2f/ec_kb3310b.c (100%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/lemote-2f/ec_kb3310b.h (100%)
           rename arch/mips/{loongson64 => loongson2ef}/lemote-2f/irq.c
        (99%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/lemote-2f/machtype.c (98%)
           rename arch/mips/{loongson64 => loongson2ef}/lemote-2f/pm.c (99%)
           rename arch/mips/{loongson64 =>
        loongson2ef}/lemote-2f/reset.c (99%)
           rename arch/mips/loongson64/{loongson-3 => }/acpi_init.c (99%)
           rename arch/mips/loongson64/{loongson-3 => }/cop2-ex.c (88%)
           rename arch/mips/loongson64/{loongson-3 => }/dma.c (82%)
           rename arch/mips/loongson64/{common => }/env.c (79%)
           rename arch/mips/loongson64/{loongson-3 => }/hpet.c (100%)
           rename arch/mips/loongson64/{loongson-3 => }/irq.c (77%)
           delete mode 100644 arch/mips/loongson64/loongson-3/Makefile
           rename arch/mips/loongson64/{loongson-3 => }/numa.c (98%)
           create mode 100644 arch/mips/loongson64/pci.c
           rename arch/mips/loongson64/{loongson-3 => }/platform.c (100%)
           create mode 100644 arch/mips/loongson64/reset.c
           create mode 100644 arch/mips/loongson64/setup.c
           rename arch/mips/loongson64/{loongson-3 => }/smp.c (99%)
           rename arch/mips/loongson64/{loongson-3 => }/smp.h (100%)

-- 
Jiaxun Yang