[PATCH V7 08/19] dax: export dax_dev_get()
From: John Groves <hidden>
Date: 2026-01-18 22:32:23
Also in:
linux-cxl, linux-fsdevel, lkml, nvdimm
Subsystem:
device direct access (dax), filesystem direct access (dax), the rest · Maintainers:
Dan Williams, Vishal Verma, Dave Jiang, Alison Schofield, Linus Torvalds
From: John Groves <john@groves.net> famfs needs to look up a dax_device by dev_t when resolving fmap entries that reference character dax devices. Signed-off-by: John Groves <john@groves.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 00c330ef437c..d097561d78db 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c@@ -513,7 +513,7 @@ 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;
@@ -536,6 +536,7 @@ 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 6897c5736543..1ef9b03f9671 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); 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);
--
2.52.0