Re: [PATCH v2] RISC-V: Fix usage of memblock_enforce_memory_limit

[Palmer Dabbelt]

On Fri, 18 Dec 2020 16:13:56 PST (-0800), Atish Patra wrote:
> memblock_enforce_memory_limit accepts the maximum memory size not the
> maximum address that can be handled by kernel. Fix the function invocation
> accordingly.
>
> Fixes: 1bd14a66ee52 ("RISC-V: Remove any memblock representing unusable memory area")
> Cc: stable@xxxxxxxxxxxxxxx
>
> Reported-by: Bin Meng <bin.meng@xxxxxxxxxxxxx>
> Tested-by: Bin Meng <bin.meng@xxxxxxxxxxxxx>
> Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
> Signed-off-by: Atish Patra <atish.patra@xxxxxxx>
> ---
> Changes from v1->v2:
> 1. Added stable-kernel in cc.
> 2. Added reported/tested by tag.
> ---
>  arch/riscv/mm/init.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
> index 13ba533f462b..bf5379135e39 100644
> --- a/arch/riscv/mm/init.c
> +++ b/arch/riscv/mm/init.c
> @@ -176,7 +176,7 @@ void __init setup_bootmem(void)
>  	 * Make sure that any memory beyond mem_start + (-PAGE_OFFSET) is removed
>  	 * as it is unusable by kernel.
>  	 */
> -	memblock_enforce_memory_limit(mem_start - PAGE_OFFSET);
> +	memblock_enforce_memory_limit(-PAGE_OFFSET);
>
>  	/* Reserve from the start of the kernel to the end of the kernel */
>  	memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);

Thanks, this is on fixes.