linux-kernel - Re: [PATCH v2 0/6] Fixmap support and MM cleanups

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Date:   Tue, 12 Feb 2019 15:15:33 -0800 (PST)
From:   Palmer Dabbelt <palmer@...ive.com>
To:     Anup Patel <Anup.Patel@....com>
CC:     aou@...s.berkeley.edu, Atish Patra <Atish.Patra@....com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Christoph Hellwig <hch@...radead.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anup Patel <Anup.Patel@....com>
Subject:     Re: [PATCH v2 0/6] Fixmap support and MM cleanups

On Sat, 19 Jan 2019 05:27:53 PST (-0800), Anup Patel wrote:
> This patchset does:
> 1. Moves MM related code from kernel/setup.c to mm/init.c
> 2. Implements compile-time fixed mappings
>
> Using fixed mappings available, we can now get earlyprints
> even without SBI calls. For example, we can use kernel
> parameter "earlycon=uart8250,mmio,0x10000000" to get early
> prints on QEMU virt machine without using SBI calls.
>
> The patchset is tested on QEMU virt machine. It is based on
> Linux-5.0-rc2 and can be found at riscv_fixmap_v2 branch of:
> https://github.com/avpatel/linux.git.
>
> Changes since v1:
>  - Use more characters per line in changelog of PATCH3
>  - Removed #ifndef __ASSEMBLY__ from PATCH5
>  - Use more characters per line in commets of PATCH5
>  - Added PATCH6 to implement keepinitrd kernel parameter
>
> Anup Patel (6):
>   RISC-V: Move free_initrd_mem() to kernel/setup.c
>   RISC-V: Setup init_mm before parse_early_param()
>   RISC-V: Move setup_bootmem() to mm/init.c
>   RISC-V: Move setup_vm() to mm/init.c
>   RISC-V: Implement compile-time fixed mappings
>   RISC-V: Implement keepinitrd kernel parameter
>
>  arch/riscv/Kconfig               |   3 +
>  arch/riscv/include/asm/fixmap.h  |  44 +++++++++++
>  arch/riscv/include/asm/pgtable.h |   1 +
>  arch/riscv/kernel/setup.c        | 114 ++++++----------------------
>  arch/riscv/mm/init.c             | 124 ++++++++++++++++++++++++++++++-
>  5 files changed, 189 insertions(+), 97 deletions(-)
>  create mode 100644 arch/riscv/include/asm/fixmap.h

I'm getting some git issue when trying to merge the third patch via email

    $ mhng-pipe-show_stdout 4 | git am -s
    Applying: RISC-V: Move setup_bootmem() to mm/init.c
    error: patch failed: arch/riscv/kernel/setup.c:163
    error: arch/riscv/kernel/setup.c: patch does not apply
    Patch failed at 0001 RISC-V: Move setup_bootmem() to mm/init.c
    Use 'git am --show-current-patch' to see the failed patch
    When you have resolved this problem, run "git am --continue".
    If you prefer to skip this patch, run "git am --skip" instead.
    To restore the original branch and stop patching, run "git am --abort".

can you send a PR with a signed tag?  I'll include this as part of the next 
merge window.

Reviewed-by: Palmer Dabbelt <palmer@...ive.com>

Thanks!