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| author | Dan Williams <dan.j.williams@intel.com> | 2018-04-02 13:14:25 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-04-03 11:51:42 -0700 |
| commit | 243f29fe449bbead69076ad861dbe8f51b42c4d7 (patch) | |
| tree | ec5ad09b16c163b79d0cbb59714fae785648ac96 /drivers/nvdimm | |
| parent | 78727137fdf49edf9f731bde79d7189067b4047a (diff) | |
| download | linux-243f29fe449bbead69076ad861dbe8f51b42c4d7.tar.gz linux-243f29fe449bbead69076ad861dbe8f51b42c4d7.tar.bz2 linux-243f29fe449bbead69076ad861dbe8f51b42c4d7.zip | |
libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device'
For debug, it is useful for bus providers to be able to retrieve the
'struct device' associated with an nd_region instance that it
registered. We already have to_nd_region() to perform the reverse cast
operation, in fact its duplicate declaration can be removed from the
private drivers/nvdimm/nd.h header.
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/nd.h | 1 | ||||
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 8 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 8d6375ee0fda..9dad5d737309 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -341,7 +341,6 @@ static inline struct device *nd_dax_create(struct nd_region *nd_region) } #endif -struct nd_region *to_nd_region(struct device *dev); int nd_region_to_nstype(struct nd_region *nd_region); int nd_region_register_namespaces(struct nd_region *nd_region, int *err); u64 nd_region_interleave_set_cookie(struct nd_region *nd_region, diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index e6d01911e092..0af275c62bdf 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -182,6 +182,14 @@ struct nd_region *to_nd_region(struct device *dev) } EXPORT_SYMBOL_GPL(to_nd_region); +struct device *nd_region_dev(struct nd_region *nd_region) +{ + if (!nd_region) + return NULL; + return &nd_region->dev; +} +EXPORT_SYMBOL_GPL(nd_region_dev); + struct nd_blk_region *to_nd_blk_region(struct device *dev) { struct nd_region *nd_region = to_nd_region(dev); |