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From:   Anup Patel <anup@brainfault.org>
Date:   Wed, 13 Feb 2019 13:51:43 +0530
Message-ID: <CAAhSdy25GUFWfkQHBDy6HysVCVFOpv-ZLY6vr+oH34XbqScYFQ@mail.gmail.com>
Subject: Re: [PATCH v2 0/6] Fixmap support and MM cleanups
To:     Palmer Dabbelt <palmer@sifive.com>
Cc:     Anup Patel <Anup.Patel@wdc.com>, Albert Ou <aou@eecs.berkeley.edu>,
        Atish Patra <Atish.Patra@wdc.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Christoph Hellwig <hch@infradead.org>,
        linux-riscv@lists.infradead.org,
        "linux-kernel@vger.kernel.org List" <linux-kernel@vger.kernel.org>
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On Wed, Feb 13, 2019 at 4:45 AM Palmer Dabbelt <palmer@sifive.com> wrote:
>
> 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@sifive.com>

Okay, I will prepare a PR with following patchsets:
1. Fixmap support and MM cleanups (Author: Anup Patel)
2. riscv: minor fixes and cleanups (Author: Johan Hovold)
3. RISC-V related changes from "Various SMP related fixes" (Author: Atish Patra)

All above patchsets touch same source files so this will
help you.

Regards,
Anup