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From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: linux-acpi@vger.kernel.org
Subject: [PATCH 3/6] libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device'
Date: Mon, 02 Apr 2018 21:46:17 -0700	[thread overview]
Message-ID: <152273077753.38372.6434283957266644623.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <152273076087.38372.4803377088477706610.stgit@dwillia2-desk3.amr.corp.intel.com>

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.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/nvdimm/nd.h          |    1 -
 drivers/nvdimm/region_devs.c |    8 ++++++++
 include/linux/libnvdimm.h    |    1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

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);
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index ff855ed965fb..e0684a678a1b 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -164,6 +164,7 @@ void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus);
 struct nvdimm_bus *to_nvdimm_bus(struct device *dev);
 struct nvdimm *to_nvdimm(struct device *dev);
 struct nd_region *to_nd_region(struct device *dev);
+struct device *nd_region_dev(struct nd_region *nd_region);
 struct nd_blk_region *to_nd_blk_region(struct device *dev);
 struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus);
 struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus);

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  parent reply	other threads:[~2018-04-03  4:56 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-03  4:46 [PATCH 0/6] nfit, address-range-scrub: rework and fixes Dan Williams
2018-04-03  4:46 ` [PATCH 1/6] nfit: fix region registration vs block-data-window ranges Dan Williams
2018-04-03 15:30   ` Dave Jiang
     [not found]   ` <152273076649.38372.8379231668189794225.stgit-p8uTFz9XbKj2zm6wflaqv1nYeNYlB/vhral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2018-04-06 20:05     ` Sasha Levin
2018-04-03  4:46 ` [PATCH 2/6] nfit, address-range-scrub: fix scrub in-progress reporting Dan Williams
2018-04-03 15:31   ` Dave Jiang
     [not found]   ` <152273077198.38372.11857145045474104173.stgit-p8uTFz9XbKj2zm6wflaqv1nYeNYlB/vhral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2018-04-06 20:05     ` Sasha Levin
2018-04-03  4:46 ` Dan Williams [this message]
2018-04-03 15:31   ` [PATCH 3/6] libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device' Dave Jiang
2018-04-03  4:46 ` [PATCH 4/6] nfit, address-range-scrub: introduce nfit_spa->ars_state Dan Williams
2018-04-03 15:31   ` Dave Jiang
2018-04-03  4:46 ` [PATCH 5/6] nfit, address-range-scrub: rework and simplify ARS state machine Dan Williams
2018-04-03 15:29   ` Dave Jiang
2018-04-03 15:33     ` Dan Williams
2018-04-04 16:26   ` Kani, Toshi
2018-04-04 17:08     ` Dan Williams
2018-04-03  4:46 ` [PATCH 6/6] nfit, address-range-scrub: add module option to skip initial ars Dan Williams

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