From: Al Viro <viro@zeniv.linux.org.uk>
To: John Groves <John@groves.net>
Cc: Jonathan Corbet <corbet@lwn.net>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Dan Williams <dan.j.williams@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Matthew Wilcox <willy@infradead.org>,
linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org,
nvdimm@lists.linux.dev, John Groves <jgroves@micron.com>,
john@jagalactic.com, Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@infradead.org>,
dave.hansen@linux.intel.com, gregory.price@memverge.com,
Randy Dunlap <rdunlap@infradead.org>,
Jerome Glisse <jglisse@google.com>,
Aravind Ramesh <arramesh@micron.com>,
Ajay Joshi <ajayjoshi@micron.com>,
Eishan Mirakhur <emirakhur@micron.com>,
Ravi Shankar <venkataravis@micron.com>,
Srinivasulu Thanneeru <sthanneeru@micron.com>,
Luis Chamberlain <mcgrof@kernel.org>,
Amir Goldstein <amir73il@gmail.com>,
Chandan Babu R <chandanbabu@kernel.org>,
Bagas Sanjaya <bagasdotme@gmail.com>,
"Darrick J . Wong" <djwong@kernel.org>,
Kent Overstreet <kent.overstreet@linux.dev>,
Steve French <stfrench@microsoft.com>,
Nathan Lynch <nathanl@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Thomas Zimmermann <tzimmermann@suse.de>,
Julien Panis <jpanis@baylibre.com>,
Stanislav Fomichev <sdf@google.com>,
Dongsheng Yang <dongsheng.yang@easystack.cn>
Subject: Re: [RFC PATCH v2 08/12] famfs: module operations & fs_context
Date: Thu, 2 May 2024 19:23:54 +0100 [thread overview]
Message-ID: <20240502182354.GH2118490@ZenIV> (raw)
In-Reply-To: <86694a1a663ab0b6e8e35c7b187f5ad179103482.1714409084.git.john@groves.net>
On Mon, Apr 29, 2024 at 12:04:24PM -0500, John Groves wrote:
> + case S_IFREG:
> + inode->i_op = NULL /* famfs_file_inode_operations */;
> + inode->i_fop = NULL /* &famfs_file_operations */;
Don't. We should never, ever store NULL in either.
inode->i_op = &empty_iops;
inode->i_fop = &no_open_fops;
in inode_init_always() is there precisely to avoid doing that.
IOW, the right thing would be something along the lines of
/* inode->i_op = famfs_file_inode_operations */;
if you want a placeholder for a patch later in the series - or
simply /* methods will be set here in a commit or two */
next prev parent reply other threads:[~2024-05-02 18:24 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 17:04 [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system John Groves
2024-04-29 17:04 ` [RFC PATCH v2 01/12] famfs: Introduce famfs documentation John Groves
2024-04-30 6:46 ` Bagas Sanjaya
2024-04-29 17:04 ` [RFC PATCH v2 02/12] dev_dax_iomap: Move dax_pgoff_to_phys() from device.c to bus.c John Groves
2024-04-29 17:04 ` [RFC PATCH v2 03/12] dev_dax_iomap: Add fs_dax_get() func to prepare dax for fs-dax usage John Groves
2024-04-29 17:04 ` [RFC PATCH v2 04/12] dev_dax_iomap: Save the kva from memremap John Groves
2024-04-29 17:04 ` [RFC PATCH v2 05/12] dev_dax_iomap: Add dax_operations for use by fs-dax on devdax John Groves
2024-04-29 17:04 ` [RFC PATCH v2 06/12] dev_dax_iomap: export dax_dev_get() John Groves
2024-04-29 17:04 ` [RFC PATCH v2 07/12] famfs prep: Add fs/super.c:kill_char_super() John Groves
2024-05-02 18:17 ` Al Viro
2024-05-02 22:25 ` John Groves
2024-05-03 9:04 ` Christian Brauner
2024-05-03 15:38 ` John Groves
2024-04-29 17:04 ` [RFC PATCH v2 08/12] famfs: module operations & fs_context John Groves
2024-04-30 11:01 ` Christian Brauner
2024-05-02 15:51 ` John Groves
2024-05-03 14:15 ` John Groves
2024-05-02 18:23 ` Al Viro [this message]
2024-05-02 21:50 ` John Groves
2024-04-29 17:04 ` [RFC PATCH v2 09/12] famfs: Introduce inode_operations and super_operations John Groves
2024-04-29 17:04 ` [RFC PATCH v2 10/12] famfs: Introduce file_operations read/write John Groves
2024-05-02 18:29 ` Al Viro
2024-05-02 21:51 ` John Groves
2024-04-29 17:04 ` [RFC PATCH v2 11/12] famfs: Introduce mmap and VM fault handling John Groves
2024-04-29 17:04 ` [RFC PATCH v2 12/12] famfs: famfs_ioctl and core file-to-memory mapping logic & iomap_ops John Groves
2024-04-29 18:32 ` [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system Matthew Wilcox
2024-04-29 23:08 ` Kent Overstreet
2024-04-30 2:24 ` John Groves
2024-04-30 3:11 ` Kent Overstreet
2024-05-01 2:09 ` John Groves
2024-04-30 2:11 ` John Groves
2024-04-30 21:01 ` Matthew Wilcox
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