linux-kernel - Re: [PATCH] xfs: add CONFIG

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Message-ID: <Zt_-ZOG6SWvGgHtb@infradead.org>
Date: Tue, 10 Sep 2024 01:08:04 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Jan Kara <jack@...e.cz>
Cc: Arnd Bergmann <arnd@...nel.org>,
	Chandan Babu R <chandan.babu@...cle.com>,
	Arnd Bergmann <arnd@...db.de>,
	"Darrick J. Wong" <djwong@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Anthony Iliopoulos <ailiop@...e.com>,
	Lukas Bulwahn <lukas.bulwahn@...il.com>,
	Kees Cook <kees@...nel.org>,
	Kent Overstreet <kent.overstreet@...il.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Josef Bacik <josef@...icpanda.com>,
	Amir Goldstein <amir73il@...il.com>, linux-xfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xfs: add CONFIG_MMU dependency

On Mon, Sep 09, 2024 at 03:42:19PM +0200, Jan Kara wrote:
> Thanks! I've noticed the error from 0-day over the weekend as well. At this
> point I'd rather handle this in a similar way as e.g. filemap_fault() is
> handled in NOMMU case. I agree users of XFS (or bcachefs for that matter)
> with !CONFIG_MMU are unlikely but fsnotify_filemap_fault() can grow more
> users over time and providing the stub is easy enough. I'll push out fixed
> version of the patch.

Yes, the stub is the right fix for this.