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Message-ID: <158500768347.2088294.5638260757259826816.stgit@dwillia2-desk3.amr.corp.intel.com>
Date: Mon, 23 Mar 2020 16:54:43 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: linux-mm@...ck.org
Cc: vishal.l.verma@...el.com, dave.hansen@...ux.intel.com, hch@....de,
linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
jmoyer@...hat.com
Subject: [PATCH 02/12] device-dax: Move instance creation parameters to
'struct dev_dax_data'
In preparation for adding more parameters to instance creation, move
existing parameters to a new struct.
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
drivers/dax/bus.c | 14 +++++++-------
drivers/dax/bus.h | 16 ++++++++--------
drivers/dax/hmem/hmem.c | 8 +++++++-
drivers/dax/pmem/core.c | 9 ++++++++-
4 files changed, 30 insertions(+), 17 deletions(-)
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 5301c294e861..a5b1b7a82a87 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -395,9 +395,9 @@ static void unregister_dev_dax(void *dev)
put_device(dev);
}
-struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
- struct dev_pagemap *pgmap, enum dev_dax_subsys subsys)
+struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data)
{
+ struct dax_region *dax_region = data->dax_region;
struct device *parent = dax_region->dev;
struct dax_device *dax_dev;
struct dev_dax *dev_dax;
@@ -405,14 +405,14 @@ struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
struct device *dev;
int rc = -ENOMEM;
- if (id < 0)
+ if (data->id < 0)
return ERR_PTR(-EINVAL);
dev_dax = kzalloc(sizeof(*dev_dax), GFP_KERNEL);
if (!dev_dax)
return ERR_PTR(-ENOMEM);
- memcpy(&dev_dax->pgmap, pgmap, sizeof(*pgmap));
+ memcpy(&dev_dax->pgmap, data->pgmap, sizeof(struct dev_pagemap));
/*
* No 'host' or dax_operations since there is no access to this
@@ -436,13 +436,13 @@ struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
inode = dax_inode(dax_dev);
dev->devt = inode->i_rdev;
- if (subsys == DEV_DAX_BUS)
+ if (data->subsys == DEV_DAX_BUS)
dev->bus = &dax_bus_type;
else
dev->class = dax_class;
dev->parent = parent;
dev->type = &dev_dax_type;
- dev_set_name(dev, "dax%d.%d", dax_region->id, id);
+ dev_set_name(dev, "dax%d.%d", dax_region->id, data->id);
rc = device_add(dev);
if (rc) {
@@ -462,7 +462,7 @@ struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
return ERR_PTR(rc);
}
-EXPORT_SYMBOL_GPL(__devm_create_dev_dax);
+EXPORT_SYMBOL_GPL(devm_create_dev_dax);
static int match_always_count;
diff --git a/drivers/dax/bus.h b/drivers/dax/bus.h
index 55577e9791da..299c2e7fac09 100644
--- a/drivers/dax/bus.h
+++ b/drivers/dax/bus.h
@@ -13,18 +13,18 @@ struct dax_region *alloc_dax_region(struct device *parent, int region_id,
struct resource *res, int target_node, unsigned int align);
enum dev_dax_subsys {
- DEV_DAX_BUS,
+ DEV_DAX_BUS = 0, /* zeroed dev_dax_data picks this by default */
DEV_DAX_CLASS,
};
-struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
- struct dev_pagemap *pgmap, enum dev_dax_subsys subsys);
+struct dev_dax_data {
+ struct dax_region *dax_region;
+ struct dev_pagemap *pgmap;
+ enum dev_dax_subsys subsys;
+ int id;
+};
-static inline struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region,
- int id, struct dev_pagemap *pgmap)
-{
- return __devm_create_dev_dax(dax_region, id, pgmap, DEV_DAX_BUS);
-}
+struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data);
/* to be deleted when DEV_DAX_CLASS is removed */
struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys);
diff --git a/drivers/dax/hmem/hmem.c b/drivers/dax/hmem/hmem.c
index 506893861253..b84fe17178d8 100644
--- a/drivers/dax/hmem/hmem.c
+++ b/drivers/dax/hmem/hmem.c
@@ -11,6 +11,7 @@ static int dax_hmem_probe(struct platform_device *pdev)
struct dev_pagemap pgmap = { };
struct dax_region *dax_region;
struct memregion_info *mri;
+ struct dev_dax_data data;
struct dev_dax *dev_dax;
struct resource *res;
@@ -26,7 +27,12 @@ static int dax_hmem_probe(struct platform_device *pdev)
if (!dax_region)
return -ENOMEM;
- dev_dax = devm_create_dev_dax(dax_region, 0, &pgmap);
+ data = (struct dev_dax_data) {
+ .dax_region = dax_region,
+ .id = 0,
+ .pgmap = &pgmap,
+ };
+ dev_dax = devm_create_dev_dax(&data);
if (IS_ERR(dev_dax))
return PTR_ERR(dev_dax);
diff --git a/drivers/dax/pmem/core.c b/drivers/dax/pmem/core.c
index ea52bb77a294..08ee5947a49c 100644
--- a/drivers/dax/pmem/core.c
+++ b/drivers/dax/pmem/core.c
@@ -14,6 +14,7 @@ struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys)
resource_size_t offset;
struct nd_pfn_sb *pfn_sb;
struct dev_dax *dev_dax;
+ struct dev_dax_data data;
struct nd_namespace_io *nsio;
struct dax_region *dax_region;
struct dev_pagemap pgmap = { };
@@ -57,7 +58,13 @@ struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys)
if (!dax_region)
return ERR_PTR(-ENOMEM);
- dev_dax = __devm_create_dev_dax(dax_region, id, &pgmap, subsys);
+ data = (struct dev_dax_data) {
+ .dax_region = dax_region,
+ .id = id,
+ .pgmap = &pgmap,
+ .subsys = subsys,
+ };
+ dev_dax = devm_create_dev_dax(&data);
/* child dev_dax instances now own the lifetime of the dax_region */
dax_region_put(dax_region);
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