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    SubjectRe: [PATCH V4 00/27] C-SKY(csky) Linux Kernel Port
    On Wed, Sep 12, 2018 at 3:25 PM Guo Ren <ren_guo@c-sky.com> wrote:
    >
    > This is the 3th version patchset to add the Linux kernel port for C-SKY(csky).
    > Thanks to everyone who provided feedback on the previous version.
    >
    > This patchset adds architecture support to Linux for C-SKY's 32-bit embedded
    > CPU cores and the patches are based on linux-4.18.4
    >
    > There are two ABI versions with several CPU cores in this patchset:
    > ABIv1: ck610 (16-bit instruction, 32-bit data path, VIPT Cache ...)
    > ABIv2: ck807 ck810 ck860 (16/32-bit variable length instruction, PIPT Cache,
    > SMP ...)
    >
    > More information: http://en.c-sky.com

    This looks good to me overall. I think a good next step would be to get the port
    included in linux-next, by preparing a git tree with all the patches and asking
    Stephen Rothwell to include it there. Further comments on the architecture
    port itself can be done on top of the existing patches. I would suggest you
    base the git tree on an -rc release (either 4.19-rc1 or 4.19-rc3) and then never
    rebase again.

    You have included a couple of drivers in the submission: two timer and
    two irqchip drivers. Please leave those out for the moment, and either have
    them merged through the respective subsystem trees, or get an Ack
    from the maintainers to merge them through your tree.

    I notice that a lot of the patches have no changeset comments on them.
    You should fix that and make a habit of describing every single patch
    with a few sentences, even if it seems obvious to you. Have a look at
    the changeset descriptions for the nds32 and riscv architectures when
    they got merged.

    One big question for me is what to do about time_t. Deepa and I are
    in the process of finalizing the system call ABI for 32-bit architectures
    with 64-bit time_t, but we are not done yet and it won't be complete
    for 4.20. If you target 4.21, that could be a chance to make csky the
    first architecture to only need the 64-bit time_t interface, with the
    corresponding user space changes.

    Arnd

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