dax: export dax_dev_get()

famfs needs to look up a dax_device by dev_t when resolving fmap
entries that reference character dax devices.

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: John Groves <john@groves.net>
Link: https://patch.msgid.link/0100019d311daab5-bb212f0b-4e05-4668-bf53-d76fab56be68-000000@email.amazonses.com
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index d4ab60c406bf8de11994cb3c98e64ec2dc477c54..25cf99dd9360bac1cf277e0ad4bfcd0c7cb86442 100644 (file)
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -521,7 +521,7 @@ 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;
@@ -544,6 +544,7 @@ 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 a85e270bfb3c67a6ee0602f2afd99646828fc279..9ef95b136bb8bfdd821d9cd955c5391f941d757a 100644 (file)
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -54,6 +54,7 @@ struct dax_device *alloc_dax(void *private, const struct dax_operations *ops);
 void *dax_holder(struct dax_device *dax_dev);
 void put_dax(struct dax_device *dax_dev);
 void kill_dax(struct dax_device *dax_dev);
+struct dax_device *dax_dev_get(dev_t devt);
 void dax_write_cache(struct dax_device *dax_dev, bool wc);
 bool dax_write_cache_enabled(struct dax_device *dax_dev);
 bool dax_synchronous(struct dax_device *dax_dev);