linux-kernel - [RFC PATCH 05/19] dev_dax_iomap: export dax_dev

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Message-Id: <20250421013346.32530-6-john@groves.net>
Date: Sun, 20 Apr 2025 20:33:32 -0500
From: John Groves <John@...ves.net>
To: John Groves <John@...ves.net>,
	Dan Williams <dan.j.williams@...el.com>,
	Miklos Szeredi <miklos@...redb.hu>,
	Bernd Schubert <bschubert@....com>
Cc: John Groves <jgroves@...ron.com>,
	Jonathan Corbet <corbet@....net>,
	Vishal Verma <vishal.l.verma@...el.com>,
	Dave Jiang <dave.jiang@...el.com>,
	Matthew Wilcox <willy@...radead.org>,
	Jan Kara <jack@...e.cz>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	"Darrick J . Wong" <djwong@...nel.org>,
	Luis Henriques <luis@...lia.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Jeff Layton <jlayton@...nel.org>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Petr Vorel <pvorel@...e.cz>,
	Brian Foster <bfoster@...hat.com>,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	nvdimm@...ts.linux.dev,
	linux-cxl@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	Amir Goldstein <amir73il@...il.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Stefan Hajnoczi <shajnocz@...hat.com>,
	Joanne Koong <joannelkoong@...il.com>,
	Josef Bacik <josef@...icpanda.com>,
	Aravind Ramesh <arramesh@...ron.com>,
	Ajay Joshi <ajayjoshi@...ron.com>,
	John Groves <john@...ves.net>
Subject: [RFC PATCH 05/19] dev_dax_iomap: export dax_dev_get()

famfs needs access to dev_dax_get()

Signed-off-by: John Groves <john@...ves.net>
---
 drivers/dax/super.c | 3 ++-
 include/linux/dax.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 48bab9b5f341..033fd841c2bb 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -452,7 +452,7 @@ static int dax_set(struct inode *inode, void *data)
 	return 0;
 }
 
-static struct dax_device *dax_dev_get(dev_t devt)
+struct dax_device *dax_dev_get(dev_t devt)
 {
 	struct dax_device *dax_dev;
 	struct inode *inode;
@@ -475,6 +475,7 @@ static struct dax_device *dax_dev_get(dev_t devt)
 
 	return dax_dev;
 }
+EXPORT_SYMBOL_GPL(dax_dev_get);
 
 struct dax_device *alloc_dax(void *private, const struct dax_operations *ops)
 {
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 86bf5922f1b0..c7bf03535b52 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -55,6 +55,7 @@ struct dax_device *alloc_dax(void *private, const struct dax_operations *ops);
 #if IS_ENABLED(CONFIG_DEV_DAX_IOMAP)
 int fs_dax_get(struct dax_device *dax_dev, void *holder, const struct dax_holder_operations *hops);
 struct dax_device *inode_dax(struct inode *inode);
+struct dax_device *dax_dev_get(dev_t devt);
 #endif
 void *dax_holder(struct dax_device *dax_dev);
 void put_dax(struct dax_device *dax_dev);
-- 
2.49.0