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| author | Dan Williams <dan.j.williams@intel.com> | 2020-01-30 21:06:18 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2020-03-17 20:23:21 +0100 |
| commit | a0e374525def2ef18a078523e1faefb5ce2b05e5 (patch) | |
| tree | dd28df25dd919c24dbc4bb8eb851dc9b401c6046 /drivers/nvdimm/namespace_devs.c | |
| parent | libnvdimm/namespace: Enforce memremap_compat_align() (diff) | |
| download | linux-a0e374525def2ef18a078523e1faefb5ce2b05e5.tar.xz linux-a0e374525def2ef18a078523e1faefb5ce2b05e5.zip | |
libnvdimm/region: Introduce NDD_LABELING
The NDD_ALIASING flag is used to indicate where pmem capacity might
alias with blk capacity and require labeling. It is also used to
indicate whether the DIMM supports labeling. Separate this latter
capability into its own flag so that the NDD_ALIASING flag is scoped to
true aliased configurations.
To my knowledge aliased configurations only exist in the ACPI spec,
there are no known platforms that ship this support in production.
This clarity allows namespace-capacity alignment constraints around
interleave-ways to be relaxed.
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Link: https://lore.kernel.org/r/158041477856.3889308.4212605617834097674.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/namespace_devs.c')
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 77e211c7d94d..01f6c22f0d1a 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -2538,7 +2538,7 @@ static int init_active_labels(struct nd_region *nd_region) if (!ndd) { if (test_bit(NDD_LOCKED, &nvdimm->flags)) /* fail, label data may be unreadable */; - else if (test_bit(NDD_ALIASING, &nvdimm->flags)) + else if (test_bit(NDD_LABELING, &nvdimm->flags)) /* fail, labels needed to disambiguate dpa */; else return 0; |