Re: [Xen-devel] [PATCH for-4.13] xen/arm: setup: Calculate correctly the size of Xen

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 16 Oct 2019, Julien Grall wrote:
> The current size of Xen is computed using _end - _start + 1. However,
> _end is pointing one past the end of Xen, so the size of Xen is
> off-by-one.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
>  xen/arch/arm/setup.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
> index 705a917abf..51d32106b7 100644
> --- a/xen/arch/arm/setup.c
> +++ b/xen/arch/arm/setup.c
> @@ -819,7 +819,7 @@ void __init start_xen(unsigned long boot_phys_offset,
>      /* Register Xen's load address as a boot module. */
>      xen_bootmodule = add_boot_module(BOOTMOD_XEN,
>                               (paddr_t)(uintptr_t)(_start + boot_phys_offset),
> -                             (paddr_t)(uintptr_t)(_end - _start + 1), false);
> +                             (paddr_t)(uintptr_t)(_end - _start), false);
>      BUG_ON(!xen_bootmodule);
>  
>      fdt_size = boot_fdt_info(device_tree_flattened, fdt_paddr);
> -- 
> 2.11.0
> 

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