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libnvdimm fixes 5.2-rc1

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* Fix a long standing namespace label corruption scenario when
   re-provisioning capacity for a namespace.
 
 * Restore the ability of the dax_pmem module to be built-in.
 
 * Harden the build for the 'nfit_test' unit test modules so that the
   userspace test harness can ensure all required test modules are
   available.
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Merge tag 'libnvdimm-fixes-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:
 "Just a small collection of fixes this time around.

  The new virtio-pmem driver is nearly ready, but some last minute
  device-mapper acks and virtio questions made it prudent to await v5.3.

  Other major topics that were brewing on the linux-nvdimm mailing list
  like sub-section hotplug, and other devm_memremap_pages() reworks will
  go upstream through Andrew's tree.

  Summary:

   - Fix a long standing namespace label corruption scenario when
     re-provisioning capacity for a namespace.

   - Restore the ability of the dax_pmem module to be built-in.

   - Harden the build for the 'nfit_test' unit test modules so that the
     userspace test harness can ensure all required test modules are
     available"

* tag 'libnvdimm-fixes-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  drivers/dax: Allow to include DEV_DAX_PMEM as builtin
  libnvdimm/namespace: Fix label tracking error
  tools/testing/nvdimm: add watermarks for dax_pmem* modules
  dax/pmem: Fix whitespace in dax_pmem
This commit is contained in:
Linus Torvalds 2019-05-15 18:56:50 -07:00
commit 83f3ef3de6
11 changed files with 72 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

3
drivers/dax/Kconfig
View file

@ -23,7 +23,6 @@ config DEV_DAX
config DEV_DAX_PMEM
tristate "PMEM DAX: direct access to persistent memory"
depends on LIBNVDIMM && NVDIMM_DAX && DEV_DAX
depends on m # until we can kill DEV_DAX_PMEM_COMPAT
default DEV_DAX
help
Support raw access to persistent memory. Note that this
@ -50,7 +49,7 @@ config DEV_DAX_KMEM
config DEV_DAX_PMEM_COMPAT
tristate "PMEM DAX: support the deprecated /sys/class/dax interface"
depends on DEV_DAX_PMEM
depends on m && DEV_DAX_PMEM=m
default DEV_DAX_PMEM
help
Older versions of the libdaxctl library expect to find all

6
drivers/dax/pmem/core.c
View file

@ -37,13 +37,13 @@ struct dev_dax *__dax_pmem_probe(struct device *dev, enum dev_dax_subsys subsys)
devm_nsio_disable(dev, nsio);
/* reserve the metadata area, device-dax will reserve the data */
pfn_sb = nd_pfn->pfn_sb;
pfn_sb = nd_pfn->pfn_sb;
offset = le64_to_cpu(pfn_sb->dataoff);
if (!devm_request_mem_region(dev, nsio->res.start, offset,
dev_name(&ndns->dev))) {
dev_warn(dev, "could not reserve metadata\n");
dev_warn(dev, "could not reserve metadata\n");
return ERR_PTR(-EBUSY);
}
}
rc = sscanf(dev_name(&ndns->dev), "namespace%d.%d", &region_id, &id);
if (rc != 2)