On 15 Jun 2020, at 21:29, Yang Shi wrote:

> Since commit 3917c80280c93a7123f1a3a6dcdb10a3ea19737d ("thp: change CoW
> semantics for anon-THP"), the CoW page fault of THP has been rewritten,
> debug_cow is not used anymore.  So, just remove it.
>
> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
> ---

Makes sense to me.

Reviewed-by: Zi Yan <ziy@nvidia.com>

—
Best Regards,
Yan Zi