diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-07-12 17:58:21 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-01-06 21:24:46 -0800 |
| commit | 9567da0b408a2553d32ca83cba4f1fc5a8aad459 (patch) | |
| tree | b381bc4c908be5e14d4653f698515725b12ae806 /drivers/dax/dax-private.h | |
| parent | 51cf784c42d07fbd62cb604836a9270cf3361509 (diff) | |
| download | lwn-9567da0b408a2553d32ca83cba4f1fc5a8aad459.tar.gz lwn-9567da0b408a2553d32ca83cba4f1fc5a8aad459.zip | |
device-dax: Introduce bus + driver model
In support of multiple device-dax instances per device-dax-region and
allowing the 'kmem' driver to attach to dax-instances instead of the
current device-node access, convert the dax sub-system from a class to a
bus. Recall that the kmem driver takes reserved / special purpose
memories and assigns them to be managed by the core-mm.
Aside from the fact the device-dax instances are registered and probed
on a bus, two other lifetime-management changes are made:
1/ Delay attaching a cdev until driver probe time
2/ A new run_dax() helper is introduced to allow restoring dax-operation
after a kill_dax() event. So, at driver ->probe() time we run_dax()
and at ->remove() time we kill_dax() and invalidate all mappings.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax/dax-private.h')
| -rw-r--r-- | drivers/dax/dax-private.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h index 620c3f4eefe7..c3a121700837 100644 --- a/drivers/dax/dax-private.h +++ b/drivers/dax/dax-private.h @@ -20,10 +20,8 @@ struct dax_device; struct dax_device *inode_dax(struct inode *inode); struct inode *dax_inode(struct dax_device *dax_dev); - -/* temporary until devm_create_dax_dev moves to bus.c */ -extern const struct attribute_group *dax_attribute_groups[]; -void unregister_dev_dax(void *dev); +int dax_bus_init(void); +void dax_bus_exit(void); /** * struct dax_region - mapping infrastructure for dax devices |