Re: [PATCH] mm: workingset: fix NULL ptr dereference

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Mon, Apr 09, 2018 at 06:41:14AM -0700, Matthew Wilcox wrote:
> It's worth noting that this is endemic in filesystems.

For the rationale in XFS take a look at commit ad22c7a043c2cc6792820e6c5da699935933e87d