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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>
This commit is contained in:
Dan Williams 2016-03-15 16:41:04 -07:00
parent c3b46c7326
commit 298f2bc5db
4 changed files with 25 additions and 22 deletions
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2
drivers/nvdimm/blk.c
View File

@ -336,7 +336,7 @@ static int nd_blk_remove(struct device *dev)
struct nd_blk_device *blk_dev = dev_get_drvdata(dev);
if (is_nd_btt(dev))
nvdimm_namespace_detach_btt(to_nd_btt(dev)->ndns);
nvdimm_namespace_detach_btt(to_nd_btt(dev));
else
nd_blk_detach_disk(blk_dev);
kfree(blk_dev);

3
drivers/nvdimm/btt.c
View File

@ -1406,9 +1406,8 @@ int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns)
}
EXPORT_SYMBOL(nvdimm_namespace_attach_btt);
int nvdimm_namespace_detach_btt(struct nd_namespace_common *ndns)
int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt)
{
struct nd_btt *nd_btt = to_nd_btt(ndns->claim);
struct btt *btt = nd_btt->btt;
btt_fini(btt);

2
drivers/nvdimm/nd.h
View File

@ -263,7 +263,7 @@ struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
resource_size_t nvdimm_namespace_capacity(struct nd_namespace_common *ndns);
struct nd_namespace_common *nvdimm_namespace_common_probe(struct device *dev);
int nvdimm_namespace_attach_btt(struct nd_namespace_common *ndns);
int nvdimm_namespace_detach_btt(struct nd_namespace_common *ndns);
int nvdimm_namespace_detach_btt(struct nd_btt *nd_btt);
const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns,
char *name);
void nvdimm_badblocks_populate(struct nd_region *nd_region,

40
drivers/nvdimm/pmem.c
View File

@ -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);
}