+ device-dax-introduce-struct-dev_dax-typed-driver-operations.patch added to -mm tree

+ device-dax-introduce-struct-dev_dax-typed-driver-operations.patch added to -mm tree

[akpm]

The patch titled
     Subject: device-dax: introduce 'struct dev_dax' typed-driver operations
has been added to the -mm tree.  Its filename is
     device-dax-introduce-struct-dev_dax-typed-driver-operations.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/device-dax-introduce-struct-dev_dax-typed-driver-operations.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/device-dax-introduce-struct-dev_dax-typed-driver-operations.patch

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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there every 3-4 working days

------------------------------------------------------
From: Dan Williams <dan.j.williams@intel.com>
Subject: device-dax: introduce 'struct dev_dax' typed-driver operations

In preparation for introducing seed devices the dax-bus core needs to be
able to intercept ->probe() and ->remove() operations.  Towards that end
arrange for the bus and drivers to switch from raw 'struct device' driver
operations to 'struct dev_dax' typed operations.

Link: https://lkml.kernel.org/r/160106113357.30709.4541750544799737855.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Cc: Jason Yan <yanaijie@huawei.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Brice Goglin <Brice.Goglin@inria.fr>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jia He <justin.he@arm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: kernel test robot <lkp@intel.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: Randy Dunlap <rdunlap@infradead.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/dax/bus.c         |   18 ++++++++++++++++++
 drivers/dax/bus.h         |    4 +++-
 drivers/dax/device.c      |   12 +++++-------
 drivers/dax/kmem.c        |   18 ++++++++----------
 drivers/dax/pmem/compat.c |    2 +-
 5 files changed, 35 insertions(+), 19 deletions(-)

--- a/drivers/dax/bus.c~device-dax-introduce-struct-dev_dax-typed-driver-operations
+++ a/drivers/dax/bus.c
@@ -135,10 +135,28 @@ static bool is_static(struct dax_region
 	return (dax_region->res.flags & IORESOURCE_DAX_STATIC) != 0;
 }
 
+static int dax_bus_probe(struct device *dev)
+{
+	struct dax_device_driver *dax_drv = to_dax_drv(dev->driver);
+	struct dev_dax *dev_dax = to_dev_dax(dev);
+
+	return dax_drv->probe(dev_dax);
+}
+
+static int dax_bus_remove(struct device *dev)
+{
+	struct dax_device_driver *dax_drv = to_dax_drv(dev->driver);
+	struct dev_dax *dev_dax = to_dev_dax(dev);
+
+	return dax_drv->remove(dev_dax);
+}
+
 static struct bus_type dax_bus_type = {
 	.name = "dax",
 	.uevent = dax_bus_uevent,
 	.match = dax_bus_match,
+	.probe = dax_bus_probe,
+	.remove = dax_bus_remove,
 	.drv_groups = dax_drv_groups,
 };
 
--- a/drivers/dax/bus.h~device-dax-introduce-struct-dev_dax-typed-driver-operations
+++ a/drivers/dax/bus.h
@@ -38,6 +38,8 @@ struct dax_device_driver {
 	struct device_driver drv;
 	struct list_head ids;
 	int match_always;
+	int (*probe)(struct dev_dax *dev);
+	int (*remove)(struct dev_dax *dev);
 };
 
 int __dax_driver_register(struct dax_device_driver *dax_drv,
@@ -48,7 +50,7 @@ void dax_driver_unregister(struct dax_de
 void kill_dev_dax(struct dev_dax *dev_dax);
 
 #if IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)
-int dev_dax_probe(struct device *dev);
+int dev_dax_probe(struct dev_dax *dev_dax);
 #endif
 
 /*
--- a/drivers/dax/device.c~device-dax-introduce-struct-dev_dax-typed-driver-operations
+++ a/drivers/dax/device.c
@@ -392,11 +392,11 @@ static void dev_dax_kill(void *dev_dax)
 	kill_dev_dax(dev_dax);
 }
 
-int dev_dax_probe(struct device *dev)
+int dev_dax_probe(struct dev_dax *dev_dax)
 {
-	struct dev_dax *dev_dax = to_dev_dax(dev);
 	struct dax_device *dax_dev = dev_dax->dax_dev;
 	struct range *range = &dev_dax->range;
+	struct device *dev = &dev_dax->dev;
 	struct dev_pagemap *pgmap;
 	struct inode *inode;
 	struct cdev *cdev;
@@ -446,17 +446,15 @@ int dev_dax_probe(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dev_dax_probe);
 
-static int dev_dax_remove(struct device *dev)
+static int dev_dax_remove(struct dev_dax *dev_dax)
 {
 	/* all probe actions are unwound by devm */
 	return 0;
 }
 
 static struct dax_device_driver device_dax_driver = {
-	.drv = {
-		.probe = dev_dax_probe,
-		.remove = dev_dax_remove,
-	},
+	.probe = dev_dax_probe,
+	.remove = dev_dax_remove,
 	.match_always = 1,
 };
 
--- a/drivers/dax/kmem.c~device-dax-introduce-struct-dev_dax-typed-driver-operations
+++ a/drivers/dax/kmem.c
@@ -29,10 +29,10 @@ static struct range dax_kmem_range(struc
 	return range;
 }
 
-int dev_dax_kmem_probe(struct device *dev)
+static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
 {
-	struct dev_dax *dev_dax = to_dev_dax(dev);
 	struct range range = dax_kmem_range(dev_dax);
+	struct device *dev = &dev_dax->dev;
 	struct resource *res;
 	char *res_name;
 	int numa_node;
@@ -88,12 +88,12 @@ int dev_dax_kmem_probe(struct device *de
 }
 
 #ifdef CONFIG_MEMORY_HOTREMOVE
-static int dev_dax_kmem_remove(struct device *dev)
+static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
 {
-	struct dev_dax *dev_dax = to_dev_dax(dev);
+	int rc;
+	struct device *dev = &dev_dax->dev;
 	struct range range = dax_kmem_range(dev_dax);
 	const char *res_name = dev_get_drvdata(dev);
-	int rc;
 
 	/*
 	 * We have one shot for removing memory, if some memory blocks were not
@@ -116,7 +116,7 @@ static int dev_dax_kmem_remove(struct de
 	return 0;
 }
 #else
-static int dev_dax_kmem_remove(struct device *dev)
+static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
 {
 	/*
 	 * Without hotremove purposely leak the request_mem_region() for the
@@ -131,10 +131,8 @@ static int dev_dax_kmem_remove(struct de
 #endif /* CONFIG_MEMORY_HOTREMOVE */
 
 static struct dax_device_driver device_dax_kmem_driver = {
-	.drv = {
-		.probe = dev_dax_kmem_probe,
-		.remove = dev_dax_kmem_remove,
-	},
+	.probe = dev_dax_kmem_probe,
+	.remove = dev_dax_kmem_remove,
 };
 
 static int __init dax_kmem_init(void)
--- a/drivers/dax/pmem/compat.c~device-dax-introduce-struct-dev_dax-typed-driver-operations
+++ a/drivers/dax/pmem/compat.c
@@ -22,7 +22,7 @@ static int dax_pmem_compat_probe(struct
 		return -ENOMEM;
 
 	device_lock(&dev_dax->dev);
-	rc = dev_dax_probe(&dev_dax->dev);
+	rc = dev_dax_probe(dev_dax);
 	device_unlock(&dev_dax->dev);
 
 	devres_close_group(&dev_dax->dev, dev_dax);
_

Patches currently in -mm which might be from dan.j.williams@intel.com are

x86-numa-cleanup-configuration-dependent-command-line-options.patch
x86-numa-add-nohmat-option.patch
efi-fake_mem-arrange-for-a-resource-entry-per-efi_fake_mem-instance.patch
acpi-hmat-refactor-hmat_register_target_device-to-hmem_register_device.patch
resource-report-parent-to-walk_iomem_res_desc-callback.patch
mm-memory_hotplug-introduce-default-phys_to_target_node-implementation.patch
acpi-hmat-attach-a-device-for-each-soft-reserved-range.patch
device-dax-drop-the-dax_regionpfn_flags-attribute.patch
device-dax-move-instance-creation-parameters-to-struct-dev_dax_data.patch
device-dax-make-pgmap-optional-for-instance-creation.patch
device-dax-kmem-introduce-dax_kmem_range.patch
device-dax-kmem-move-resource-name-tracking-to-drvdata.patch
device-dax-kmem-replace-release_resource-with-release_mem_region.patch
device-dax-add-an-allocation-interface-for-device-dax-instances.patch
device-dax-introduce-struct-dev_dax-typed-driver-operations.patch
device-dax-introduce-seed-devices.patch
drivers-base-make-device_find_child_by_name-compatible-with-sysfs-inputs.patch
device-dax-add-resize-support.patch
mm-memremap_pages-convert-to-struct-range.patch
mm-memremap_pages-support-multiple-ranges-per-invocation.patch
device-dax-add-dis-contiguous-resource-support.patch
device-dax-introduce-mapping-devices.patch
device-dax-add-an-align-attribute.patch