[PATCH -next v6 07/10] arm: armv8: mmu: add mmu_unmap_reserved_mem

[Ilias Apalodimas]

Hi Anshul,

[....]

>
>         return 0;
>  }
> +
> +int mmu_unmap_reserved_mem(const char *name)
> +{
> +       void *fdt = (void *)gd->fdt_blob;
> +       char node_path[128];
> +       fdt_addr_t addr;
> +       fdt_size_t size;
> +       int ret;
> +
> +       snprintf(node_path, sizeof(node_path), "/reserved-memory/%s", name);
> +       ret = fdt_path_offset(fdt, node_path);
> +       if (ret < 0)
> +               return ret;
> +
> +       addr = fdtdec_get_addr_size(fdt, ret, "reg", &size);
> +       if (addr == FDT_ADDR_T_NONE)
> +               return -1;
> +
> +       mmu_change_region_attr(addr, size, PTE_TYPE_FAULT);

Since you are basically breaking the memory map here, you can use
mmu_change_region_attr_nobreak() and not run the loop twice.

[...]

Cheers
/Ilias