Hi Quanfa,

> @@ -1653,7 +1653,7 @@ int memory_failure(unsigned long pfn, int flags)
>
>       /*
>        * We need/can do nothing about count=0 pages.
> -      * 1) it's a free page, and therefore in safe hand:
> +      * 1) it's a freed page, and therefore in safe hand:
>        *    prep_new_page() will be the gate keeper.
>        * 2) it's part of a non-compound high order page.
>        *    Implies some kernel user: cannot stop them from

I think that the word "free page" is common enough and you can find it
in many other files, so it makes little sense to fix it as a typo?

Thanks,
Naoya Horiguchi