From 243f29fe449bbead69076ad861dbe8f51b42c4d7 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Mon, 2 Apr 2018 13:14:25 -0700 Subject: 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 Signed-off-by: Dan Williams --- drivers/nvdimm/region_devs.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/nvdimm/region_devs.c') 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); -- cgit v1.2.3