Re: [PATCH v1] riscv: mm: Define PAGE_KERNEL_RO

[patchwork-bot+linux-riscv@kernel.org]

Hello:

This patch was applied to riscv/linux.git (fixes)
by Paul Walmsley <pjw@kernel.org>:

On Sat, 17 Oct 2026 22:36:49 -0400 you wrote:
> Kernel mappings that generic code creates read-only are writable on
> riscv. With HugeTLB vmemmap optimization (selected by riscv and on by
> default with CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON), the tail
> vmemmap pages of every optimized huge page are remapped to one shared
> page with PAGE_KERNEL_RO so that a stray write to a tail struct page
> faults. On riscv that remap keeps _PAGE_WRITE, so such a write silently
> changes the struct pages of every optimized huge page instead.
> early_memremap_ro() (EFI system and configuration tables), the
> firmware loader's vmap() of the loaded image, and acpi_os_ioremap() for
> EFI runtime code and NOMAP regions, which asks for a read-only mapping
> precisely to avoid a writable mapping of executable code, are affected
> the same way.
> 
> [...]

Here is the summary with links:
  - [v1] riscv: mm: Define PAGE_KERNEL_RO
    https://git.kernel.org/riscv/c/551bdd6fcaba

You are awesome, thank you!
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