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    SubjectRe: [PATCH v5 0/6] Move swapper_pg_dir to rodata section.
    Hi,

    On Mon, Sep 17, 2018 at 12:43:27PM +0800, Jun Yao wrote:
    > Version 5 changes:
    > 1. Correct spelling and indentation errors[1].
    > 2. Update init_mm.pgd by assembly[2].
    > 3. Simplify set_p?d() by introducing set_swapper_pgd()[3].
    > 4. Reduce unnecessary tlbi for every write to swapper_pg_dir
    > during paging_init()[3].
    >
    > v4: https://www.spinics.net/lists/arm-kernel/msg672195.html
    > v3: https://www.spinics.net/lists/arm-kernel/msg662537.html
    > v2: https://patchwork.kernel.org/patch/10485641/
    > v1: https://patchwork.kernel.org/patch/10476595/
    >
    > [1] https://www.spinics.net/lists/arm-kernel/msg675189.html
    > [2] https://www.spinics.net/lists/arm-kernel/msg675193.html
    > [3] https://www.spinics.net/lists/arm-kernel/msg675196.html
    >
    > Jun Yao (6):
    > arm64/mm: Introduce the init_pg_dir.
    > arm64/mm: Pass ttbr1 as a parameter to __enable_mmu().
    > arm64/mm: Create the initial page table in the init_pg_dir.
    > arm64/mm: Create the final page table directly in swapper_pg_dir.
    > arm64/mm: Populate the swapper_pg_dir by fixmap.
    > arm64/mm: Move {idmap_pg_dir .. swapper_pg_dir} to rodata section.
    >
    > arch/arm64/include/asm/assembler.h | 29 ++++++++++++++++++
    > arch/arm64/include/asm/pgtable.h | 36 ++++++++++++++++++----
    > arch/arm64/kernel/asm-offsets.c | 1 +
    > arch/arm64/kernel/head.S | 48 ++++++++++++++++++++----------
    > arch/arm64/kernel/sleep.S | 1 +
    > arch/arm64/kernel/vmlinux.lds.S | 47 +++++++++++++++++++----------
    > arch/arm64/mm/mmu.c | 45 +++++++++++++---------------
    > 7 files changed, 147 insertions(+), 60 deletions(-)

    I've pushed a branch with the cleanups I requested [1] folded in.

    I'm still a bit worried about the pgd lock, but otherwise I think this
    is sound. I intend to throw some testing at it, just in case.

    If you're happy with that branch, I'll ask Will and Catalin to consider
    picking it up.

    Thanks,
    Mark.

    [1] git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/ro-swapper

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