linux-kernel - Re: [PATCH 2/2] vfs: don't allow writes to swap files

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Message-ID: <20190816064121.GB2024@infradead.org>
Date:   Thu, 15 Aug 2019 23:41:21 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     hch@...radead.org, akpm@...ux-foundation.org, tytso@....edu,
        viro@...iv.linux.org.uk, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 2/2] vfs: don't allow writes to swap files

The new checks look fine to me, but where does the inode_drain_writes()
function come from, I can't find that in my tree anywhere.

Also what does inode_drain_writes do about existing shared writable
mapping?  Do we even care about that corner case?