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Commit 9f1e8cee authored by Dan Williams's avatar Dan Williams
Browse files

libnvdimm, pfn: kill ND_PFN_ALIGN 



The alignment constraint isn't necessary now that devm_memremap_pages()
allows for unaligned mappings.

Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 6bb691ac

drivers/nvdimm/nd.h

+0 −7
Original line number Diff line number Diff line
@@ -29,13 +29,6 @@ enum { 
	ND_MAX_LANES = 256,

	SECTOR_SHIFT = 9,

	INT_LBASIZE_ALIGNMENT = 64,

#if IS_ENABLED(CONFIG_NVDIMM_PFN)

	ND_PFN_ALIGN = PAGES_PER_SECTION * PAGE_SIZE,

	ND_PFN_MASK = ND_PFN_ALIGN - 1,

#else

	ND_PFN_ALIGN = 0,

	ND_PFN_MASK = 0,

#endif

};



struct nvdimm_drvdata {

drivers/nvdimm/pfn_devs.c

+1 −10
Original line number Diff line number Diff line
@@ -241,10 +241,6 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn) 
	if (!is_nd_pmem(nd_pfn->dev.parent))

		return -ENODEV;



	/* section alignment for simple hotplug */

	if (nvdimm_namespace_capacity(ndns) < ND_PFN_ALIGN)

		return -ENODEV;



	if (nvdimm_read_bytes(ndns, SZ_4K, pfn_sb, sizeof(*pfn_sb)))

		return -ENXIO;
@@ -286,12 +282,7 @@ int nd_pfn_validate(struct nd_pfn *nd_pfn) 
	 */

	offset = le64_to_cpu(pfn_sb->dataoff);

	nsio = to_nd_namespace_io(&ndns->dev);

	if (nsio->res.start & ND_PFN_MASK) {

		dev_err(&nd_pfn->dev,

				"init failed: %s not section aligned\n",

				dev_name(&ndns->dev));

		return -EBUSY;

	} else if (offset >= resource_size(&nsio->res)) {

	if (offset >= resource_size(&nsio->res)) {

		dev_err(&nd_pfn->dev, "pfn array size exceeds capacity of %s\n",

				dev_name(&ndns->dev));

		return -EBUSY;

drivers/nvdimm/pmem.c

+0 −15
Original line number Diff line number Diff line
@@ -241,11 +241,6 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn) 
	if (rc == 0 || rc == -EBUSY)

		return rc;



	/* section alignment for simple hotplug */

	if (nvdimm_namespace_capacity(ndns) < ND_PFN_ALIGN

			|| pmem->phys_addr & ND_PFN_MASK)

		return -ENODEV;



	nd_region = to_nd_region(nd_pfn->dev.parent);

	if (nd_region->ro) {

		dev_info(&nd_pfn->dev,
@@ -326,16 +321,6 @@ static int nvdimm_namespace_attach_pfn(struct nd_namespace_common *ndns) 
	if (rc)

		return rc;



	if (PAGE_SIZE != SZ_4K) {

		dev_err(dev, "only supported on systems with 4K PAGE_SIZE\n");

		return -ENXIO;

	}

	if (nsio->res.start & ND_PFN_MASK) {

		dev_err(dev, "%s not memory hotplug section aligned\n",

				dev_name(&ndns->dev));

		return -ENXIO;

	}



	pfn_sb = nd_pfn->pfn_sb;

	offset = le64_to_cpu(pfn_sb->dataoff);

	nd_pfn->mode = le32_to_cpu(nd_pfn->pfn_sb->mode);