Re: [PATCH 2/5] mm, devm_memremap_pages: handle errors allocating final devres action

[Christoph Hellwig]

On Mon, May 21, 2018 at 03:35:24PM -0700, Dan Williams wrote:
> The last step before devm_memremap_pages() returns success is to
> allocate a release action to tear the entire setup down. However, the
> result from devm_add_action() is not checked.
> 
> Checking the error also means that we need to handle the fact that the
> percpu_ref may not be killed by the time devm_memremap_pages_release()
> runs. Add a new state flag for this case.

Looks good (modulo any stable tag issues):

Reviewed-by: Christoph Hellwig <hch@xxxxxx>