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dax: export dax_dev_get()

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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>
This commit is contained in:
John Groves 2026-03-27 21:05:21 +00:00 committed by Ira Weiny
parent eec38f5d86
commit 2ae624d5a5
2 changed files with 3 additions and 1 deletions
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3
drivers/dax/super.c
View File

@ -521,7 +521,7 @@ static int dax_set(struct inode *inode, void *data)
return 0; 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 dax_device *dax_dev;
struct inode *inode; struct inode *inode;
@ -544,6 +544,7 @@ static struct dax_device *dax_dev_get(dev_t devt)
return dax_dev; return dax_dev;
} }
EXPORT_SYMBOL_GPL(dax_dev_get);
struct dax_device *alloc_dax(void *private, const struct dax_operations *ops) struct dax_device *alloc_dax(void *private, const struct dax_operations *ops)
{ {

1
include/linux/dax.h
View File

@ -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 *dax_holder(struct dax_device *dax_dev);
void put_dax(struct dax_device *dax_dev); void put_dax(struct dax_device *dax_dev);
void kill_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); void dax_write_cache(struct dax_device *dax_dev, bool wc);
bool dax_write_cache_enabled(struct dax_device *dax_dev); bool dax_write_cache_enabled(struct dax_device *dax_dev);
bool dax_synchronous(struct dax_device *dax_dev); bool dax_synchronous(struct dax_device *dax_dev);