[PATCH v5 1/9] MIPS: Avoid future duplicate elf core header reservation

[Geert Uytterhoeven]

On Wed, Aug 11, 2021 at 10:51 AM Geert Uytterhoeven
<geert+renesas at glider.be> wrote:
> Prepare for early_init_fdt_scan_reserved_mem() reserving the memory
> occupied by an elf core header described in the device tree.
> As arch_mem_init() calls early_init_fdt_scan_reserved_mem() before
> mips_reserve_vmcore(), the latter needs to check if the memory has
> already been reserved before.
>
> Note that mips_reserve_vmcore() cannot just be removed, as not all MIPS
> systems use DT.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> ---
> v5:
>   - New.
> ---
>  arch/mips/kernel/setup.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
> index 23a140327a0bac1b..4693add05743d78b 100644
> --- a/arch/mips/kernel/setup.c
> +++ b/arch/mips/kernel/setup.c
> @@ -429,7 +429,8 @@ static void __init mips_reserve_vmcore(void)
>         pr_info("Reserving %ldKB of memory at %ldKB for kdump\n",
>                 (unsigned long)elfcorehdr_size >> 10, (unsigned long)elfcorehdr_addr >> 10);
>
> -       memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
> +       if (!memblock_is_region_reserved(elfcorehdr_addr, elfcorehdr_size)

As pointed out by lkp, there's a closing parenthesis missing.

/me hides back under his rock.

> +               memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
>  #endif

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds