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| author | Miklos Szeredi <mszeredi@redhat.com> | 2026-10-19 14:56:11 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2026-10-19 14:56:11 +0200 |
| commit | c87dd99b6d0fe07e836c1593c03e8174029c66f4 (patch) | |
| tree | 66b2be6ecc1cb9f8e72b7e53d796d988be0351d5 /include/linux | |
| parent | bf4ccbaad8bdff8c90fd290ed6135b63f89ee8a7 (diff) | |
| download | linux-next-c87dd99b6d0fe07e836c1593c03e8174029c66f4.tar.gz linux-next-c87dd99b6d0fe07e836c1593c03e8174029c66f4.zip | |
dax: add fsdev_dax_from_file()
If the file is a fsdev_dax open, take the dax_dev from the device inode's
i_cdev. Return with a reference grabbed on the private dax inode.
Make dax_dev_get() static again (internal to super.c for alloc_dax), export
fsdev_dax_from_file() instead.
This fix is in response to a Sashiko review, and some subsequent analysis.
About the 'fixes' tag: this removes the export of dax_dev_get(), which was
flawed, and replaces it with fsdev_dax_from_file(). It feels like the fixes
tag makes sense for correcting an ABI error.
Fixes: 2ae624d5a555d ("dax: export dax_dev_get()")
Originally-by: John Groves <john@groves.net>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Gregory Price (Meta) <gourry@gourry.net>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/dax.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h index fe6c3ded1b50..2c9fc81f031b 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -54,7 +54,6 @@ 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); @@ -323,3 +322,5 @@ typedef int (*walk_hmem_fn)(struct device *dev, int target_nid, const struct resource *res); int walk_hmem_resources(struct device *dev, walk_hmem_fn fn); #endif + +struct dax_device *fsdev_dax_from_file(struct file *file); |