[PATCH 1/5] mm: add PSI accounting around ->read_folio and ->readahead calls

[Christoph Hellwig]

On Sat, Sep 10, 2022 at 07:26:35PM +0100, Matthew Wilcox wrote:
> I don't have time to look at this properly right now (about to catch a
> bus to the plane), but I think this should be |=, not =?

Yes.