Re: "mm: fix lazyfree BUG_ON check in try_to_unmap_one()" build error

[Andrew Morton]

On Thu, 9 Mar 2017 15:02:26 +0900 Minchan Kim <minc...@kernel.org> wrote:

> Sergey reported VM_WARN_ON_ONCE returns void with !CONFIG_DEBUG_VM
> so we cannot use it as if's condition unlike WARN_ON.

Can we instead fix VM_WARN_ON_ONCE()?