[PATCH 1/2] filemap: fix the conditional folio_put in filemap_fault

[Christoph Hellwig]

On Wed, May 03, 2023 at 04:48:20PM +0100, Matthew Wilcox wrote:
> > -		folio_put(folio);
> 
> Why not simply:
> 
> -	if (folio)
> +	if (!IS_ERR_OR_NULL(folio))

no need for the OR_NULL.  But I find the extra label way easier to
reason about, and it's exactly the same amount of code.