Re: [Xen-devel] [PATCH] efi/boot: Avoid memory corruption when freeing ebmalloc area

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 28.02.17 at 12:44, <andrew.cooper3@xxxxxxxxxx> wrote:
> --- a/xen/common/efi/boot.c
> +++ b/xen/common/efi/boot.c
> @@ -148,7 +148,7 @@ static void __init __maybe_unused 
> free_ebmalloc_unused_mem(void)
>  {
>      unsigned long start, end;
>  
> -    start = (unsigned long)ebmalloc_mem + PAGE_ALIGN(ebmalloc_allocated);
> +    start = (unsigned long)ebmalloc_mem + ROUNDUP(ebmalloc_allocated, 
> PAGE_SIZE);

With

#define PAGE_ALIGN(x) (((x) + PAGE_SIZE - 1) & PAGE_MASK)

I don't see any behavioral change with your adjustment.

Jan


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