On Tue, 2019-03-12 at 16:17 -0400, Josef Bacik wrote:
> We noticed a panic happening in production with the filemap fault
> pages
> because we were unlocking a NULL page.  If add_to_page_cache() fails
> then we'll have a NULL page, so fix this check to only unlock if we
> have a valid page.
> 
> Signed-off-by: Josef Bacik <josef@toxicpanda.com>

Reviewed-by: Rik van Riel <riel@surriel.com>
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