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@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brice Goglin <Brice.Goglin@inria.fr>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: David Hildenbrand <david@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Jia He <justin.he@arm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Will Deacon <will@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Hulk Robot <hulkci@huawei.com>
Cc: Jason Yan <yanaijie@huawei.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: kernel test robot <lkp@intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Link: https://lkml.kernel.org/r/159643099411.4062302.1337305960720423895.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index f06ffa6..dffa465 100644 (file)
--- 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
@@ -438,13 +438,13 @@ 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) {
@@ -464,7 +464,7 @@ 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 55577e9..299c2e7 100644 (file)
--- 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 5068938..b84fe17 100644 (file)
--- 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 ea52bb7..08ee594 100644 (file)
--- 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);