+ device-dax-kmem-move-resource-name-tracking-to-drvdata.patch added to -mm tree

+ device-dax-kmem-move-resource-name-tracking-to-drvdata.patch added to -mm tree

[akpm]

The patch titled
     Subject: device-dax/kmem: move resource name tracking to drvdata
has been added to the -mm tree.  Its filename is
     device-dax-kmem-move-resource-name-tracking-to-drvdata.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/device-dax-kmem-move-resource-name-tracking-to-drvdata.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/device-dax-kmem-move-resource-name-tracking-to-drvdata.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

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

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Dan Williams <dan.j.williams@intel.com>
Subject: device-dax/kmem: move resource name tracking to drvdata

Towards removing the mode specific @dax_kmem_res attribute from the
generic 'struct dev_dax', and preparing for multi-range support, move
resource name tracking to driver data.  The memory for the resource name
needs to have its own lifetime separate from the device bind lifetime for
cases where the driver is unbound, but the kmem range could not be
unplugged from the page allocator.

Link: https://lkml.kernel.org/r/160106111639.30709.17624822766862009183.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Brice Goglin <Brice.Goglin@inria.fr>
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: Hulk Robot <hulkci@huawei.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Jason Yan <yanaijie@huawei.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: 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/kmem.c |   16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

--- a/drivers/dax/kmem.c~device-dax-kmem-move-resource-name-tracking-to-drvdata
+++ a/drivers/dax/kmem.c
@@ -34,7 +34,7 @@ int dev_dax_kmem_probe(struct device *de
 	struct dev_dax *dev_dax = to_dev_dax(dev);
 	struct range range = dax_kmem_range(dev_dax);
 	struct resource *new_res;
-	const char *new_res_name;
+	char *res_name;
 	int numa_node;
 	int rc;
 
@@ -51,15 +51,15 @@ int dev_dax_kmem_probe(struct device *de
 		return -EINVAL;
 	}
 
-	new_res_name = kstrdup(dev_name(dev), GFP_KERNEL);
-	if (!new_res_name)
+	res_name = kstrdup(dev_name(dev), GFP_KERNEL);
+	if (!res_name)
 		return -ENOMEM;
 
 	/* Region is permanently reserved if hotremove fails. */
-	new_res = request_mem_region(range.start, range_len(&range), new_res_name);
+	new_res = request_mem_region(range.start, range_len(&range), res_name);
 	if (!new_res) {
 		dev_warn(dev, "could not reserve region [%#llx-%#llx]\n", range.start, range.end);
-		kfree(new_res_name);
+		kfree(res_name);
 		return -EBUSY;
 	}
 
@@ -80,9 +80,11 @@ int dev_dax_kmem_probe(struct device *de
 	if (rc) {
 		release_resource(new_res);
 		kfree(new_res);
-		kfree(new_res_name);
+		kfree(res_name);
 		return rc;
 	}
+
+	dev_set_drvdata(dev, res_name);
 	dev_dax->dax_kmem_res = new_res;
 
 	return 0;
@@ -94,7 +96,7 @@ static int dev_dax_kmem_remove(struct de
 	struct dev_dax *dev_dax = to_dev_dax(dev);
 	struct range range = dax_kmem_range(dev_dax);
 	struct resource *res = dev_dax->dax_kmem_res;
-	const char *res_name = res->name;
+	const char *res_name = dev_get_drvdata(dev);
 	int rc;
 
 	/*
_

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