linux-ext4 - Re: return an ERR_PTR from __filemap_get

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Date:   Mon, 23 Jan 2023 10:59:45 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Matthew Wilcox <willy@...radead.org>,
        Hugh Dickins <hughd@...gle.com>, linux-afs@...ts.infradead.org,
        linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org,
        cluster-devel@...hat.com, linux-mm@...ck.org,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-nilfs@...r.kernel.org
Subject: Re: return an ERR_PTR from __filemap_get_folio v2

On Sun, 22 Jan 2023 08:20:06 +0100 Christoph Hellwig <hch@....de> wrote:

> On Sat, Jan 21, 2023 at 05:06:41PM -0800, Andrew Morton wrote:
> > This patchset doesn't apply to fs/btrfs/ because linux-next contains
> > this 6+ month-old commit:
> 
> Hmm.  It was literally written against linux-next as of last morning,
> which does not have that commit.

Confused.  According to 
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/fs/btrfs/disk-io.c#n4023

it's there today.  wait_dev_supers() has been foliofied.