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authorDan Williams <dan.j.williams@intel.com>2016-03-15 16:41:04 -0700
committerDan Williams <dan.j.williams@intel.com>2016-04-22 10:59:54 -0700
commit298f2bc5db3851cf2e839a0025425256ef852139 (patch)
tree0a08fc850f39f7160ab9bfe049e5eb66078c2f13 /drivers/nvdimm/pmem.c
parentc3b46c73264b03000d1e18b22f5caf63332547c9 (diff)
downloadlinux-298f2bc5db3851cf2e839a0025425256ef852139.tar.bz2
libnvdimm, pmem: kill pmem->ndns
We can derive the common namespace from other information. We also do not need to cache it because all the usages are in slow paths. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/pmem.c')
-rw-r--r--drivers/nvdimm/pmem.c40
1 files changed, 22 insertions, 18 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index f798899338ed..2b51d4d34207 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -35,7 +35,6 @@
struct pmem_device {
struct request_queue *pmem_queue;
struct gendisk *pmem_disk;
- struct nd_namespace_common *ndns;
/* One contiguous memory region per device */
phys_addr_t phys_addr;
@@ -436,9 +435,8 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
return -ENXIO;
}
-static int nvdimm_namespace_detach_pfn(struct nd_namespace_common *ndns)
+static int nvdimm_namespace_detach_pfn(struct nd_pfn *nd_pfn)
{
- struct nd_pfn *nd_pfn = to_nd_pfn(ndns->claim);
struct pmem_device *pmem;
/* free pmem disk */
@@ -537,7 +535,7 @@ static int __nvdimm_namespace_attach_pfn(struct nd_pfn *nd_pfn)
return rc;
err:
- nvdimm_namespace_detach_pfn(ndns);
+ nvdimm_namespace_detach_pfn(nd_pfn);
return rc;
}
@@ -573,7 +571,6 @@ static int nd_pmem_probe(struct device *dev)
if (IS_ERR(pmem))
return PTR_ERR(pmem);
- pmem->ndns = ndns;
dev_set_drvdata(dev, pmem);
ndns->rw_bytes = pmem_rw_bytes;
if (devm_init_badblocks(dev, &pmem->bb))
@@ -607,9 +604,9 @@ static int nd_pmem_remove(struct device *dev)
struct pmem_device *pmem = dev_get_drvdata(dev);
if (is_nd_btt(dev))
- nvdimm_namespace_detach_btt(pmem->ndns);
+ nvdimm_namespace_detach_btt(to_nd_btt(dev));
else if (is_nd_pfn(dev))
- nvdimm_namespace_detach_pfn(pmem->ndns);
+ nvdimm_namespace_detach_pfn(to_nd_pfn(dev));
else
pmem_detach_disk(pmem);
@@ -618,26 +615,33 @@ static int nd_pmem_remove(struct device *dev)
static void nd_pmem_notify(struct device *dev, enum nvdimm_event event)
{
- struct pmem_device *pmem = dev_get_drvdata(dev);
- struct nd_namespace_common *ndns = pmem->ndns;
struct nd_region *nd_region = to_nd_region(dev->parent);
- struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
- struct resource res = {
- .start = nsio->res.start + pmem->data_offset,
- .end = nsio->res.end,
- };
+ struct pmem_device *pmem = dev_get_drvdata(dev);
+ resource_size_t offset = 0, end_trunc = 0;
+ struct nd_namespace_common *ndns;
+ struct nd_namespace_io *nsio;
+ struct resource res;
if (event != NVDIMM_REVALIDATE_POISON)
return;
- if (is_nd_pfn(dev)) {
+ if (is_nd_btt(dev)) {
+ struct nd_btt *nd_btt = to_nd_btt(dev);
+
+ ndns = nd_btt->ndns;
+ } else if (is_nd_pfn(dev)) {
struct nd_pfn *nd_pfn = to_nd_pfn(dev);
struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;
- res.start += __le32_to_cpu(pfn_sb->start_pad);
- res.end -= __le32_to_cpu(pfn_sb->end_trunc);
- }
+ ndns = nd_pfn->ndns;
+ offset = pmem->data_offset + __le32_to_cpu(pfn_sb->start_pad);
+ end_trunc = __le32_to_cpu(pfn_sb->end_trunc);
+ } else
+ ndns = to_ndns(dev);
+ nsio = to_nd_namespace_io(&ndns->dev);
+ res.start = nsio->res.start + offset;
+ res.end = nsio->res.end - end_trunc;
nvdimm_badblocks_populate(nd_region, &pmem->bb, &res);
}