Re: [PATCH v5 4/8] module: prepare to handle ROX allocations for text

Song Liu <[email protected]> Wed, 9 Oct 2024 15:23:40 -0700

Newsgroups	gmane.linux.ports.alpha,gmane.linux.kernel.bpf,gmane.linux.kernel.cross-arch,gmane.linux.ports.arm.kernel,gmane.linux.ports.hexagon,gmane.linux.kernel,gmane.linux.ports.mips,gmane.linux.kernel.mm,gmane.linux.kernel.modules,gmane.linux.ports.parisc,gmane.linux.ports.riscv,gmane.linux.ports.sh.devel,gmane.linux.kernel.arc,gmane.linux.uml.devel,gmane.linux.ports.ppc64.devel,gmane.linux.ports.sparc
Message-ID	<CAPhsuW66etfdU3Fvk0KsELXcgWD6_TkBFjJ-BTHQu5OejDsP2w@mail.gmail.com>

On Wed, Oct 9, 2024 at 11:10 AM Mike Rapoport <[email protected]> wrote:
[...]
> diff --git a/include/linux/module.h b/include/linux/module.h
> index 88ecc5e9f523..7039f609c6ef 100644
> --- a/include/linux/module.h
> +++ b/include/linux/module.h
> @@ -367,6 +367,8 @@ enum mod_mem_type {
>
>  struct module_memory {
>         void *base;
> +       void *rw_copy;
> +       bool is_rox;
>         unsigned int size;

Do we really need to hold the rw_copy all the time? I was
thinking we only need a temporary buffer when we want to
update anything. The buffer might be much smaller than "size".

Thanks,
Song

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