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| author |   Dan Williams <dan.j.williams@intel.com> | 2017-05-04 14:01:24 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-05-04 14:01:24 -0700 |
| commit | 8f078b38dd382710884ce7abd31a1935c440e6f8 (patch) | |
| tree | bec3467c1f513663801d7fb62a9c56bea2fe52b6 /drivers/nvdimm/dimm_devs.c | |
| parent | device-dax: fix sysfs attribute deadlock (diff) | |
| download | linux-dev-8f078b38dd382710884ce7abd31a1935c440e6f8.tar.xz linux-dev-8f078b38dd382710884ce7abd31a1935c440e6f8.zip | |
libnvdimm: convert NDD_ flags to use bitops, introduce NDD_LOCKED
This is a preparation patch for handling locked nvdimm label regions, a
new concept as introduced by the latest DSM document on pmem.io [1]. A
future patch will leverage nvdimm_set_locked() at DIMM probe time to
flag regions that can not be enabled. There should be no functional
difference resulting from this change.
[1]: http://pmem.io/documents/NVDIMM_DSM_Interface_Example-V1.3.pdf
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/dimm_devs.c')
| -rw-r--r-- | drivers/nvdimm/dimm_devs.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index 8b721321be5b..7d1a3dbc7d5d 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -34,7 +34,7 @@ int nvdimm_check_config_data(struct device *dev) if (!nvdimm->cmd_mask || !test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) { - if (nvdimm->flags & NDD_ALIASING) + if (test_bit(NDD_ALIASING, &nvdimm->flags)) return -ENXIO; else return -ENOTTY; @@ -188,7 +188,14 @@ void nvdimm_set_aliasing(struct device *dev) { struct nvdimm *nvdimm = to_nvdimm(dev); - nvdimm->flags |= NDD_ALIASING; + set_bit(NDD_ALIASING, &nvdimm->flags); +} + +void nvdimm_set_locked(struct device *dev) +{ + struct nvdimm *nvdimm = to_nvdimm(dev); + + set_bit(NDD_LOCKED, &nvdimm->flags); } static void nvdimm_release(struct device *dev) |