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Merge branch 'for-4.18/dax' into libnvdimm-for-next

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This commit is contained in:
Dan Williams 2018-06-08 15:16:40 -07:00
commit b56845794e
21 changed files with 545 additions and 295 deletions
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2
drivers/nvdimm/pfn_devs.c
View file

@ -561,8 +561,6 @@ static int __nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
res->start += start_pad;
res->end -= end_trunc;
pgmap->type = MEMORY_DEVICE_HOST;
if (nd_pfn->mode == PFN_MODE_RAM) {
if (offset < SZ_8K)
return -EINVAL;

25
drivers/nvdimm/pmem.c
View file

@ -289,6 +289,27 @@ static void pmem_release_disk(void *__pmem)
put_disk(pmem->disk);
}
static void pmem_release_pgmap_ops(void *__pgmap)
{
dev_pagemap_put_ops();
}
static void fsdax_pagefree(struct page *page, void *data)
{
wake_up_var(&page->_refcount);
}
static int setup_pagemap_fsdax(struct device *dev, struct dev_pagemap *pgmap)
{
dev_pagemap_get_ops();
if (devm_add_action_or_reset(dev, pmem_release_pgmap_ops, pgmap))
return -ENOMEM;
pgmap->type = MEMORY_DEVICE_FS_DAX;
pgmap->page_free = fsdax_pagefree;
return 0;
}
static int pmem_attach_disk(struct device *dev,
struct nd_namespace_common *ndns)
{
@ -347,6 +368,8 @@ static int pmem_attach_disk(struct device *dev,
pmem->pfn_flags = PFN_DEV;
pmem->pgmap.ref = &q->q_usage_counter;
if (is_nd_pfn(dev)) {
if (setup_pagemap_fsdax(dev, &pmem->pgmap))
return -ENOMEM;
addr = devm_memremap_pages(dev, &pmem->pgmap);
pfn_sb = nd_pfn->pfn_sb;
pmem->data_offset = le64_to_cpu(pfn_sb->dataoff);
@ -358,6 +381,8 @@ static int pmem_attach_disk(struct device *dev,
} else if (pmem_should_map_pages(dev)) {
memcpy(&pmem->pgmap.res, &nsio->res, sizeof(pmem->pgmap.res));
pmem->pgmap.altmap_valid = false;
if (setup_pagemap_fsdax(dev, &pmem->pgmap))
return -ENOMEM;
addr = devm_memremap_pages(dev, &pmem->pgmap);
pmem->pfn_flags |= PFN_MAP;
memcpy(&bb_res, &pmem->pgmap.res, sizeof(bb_res));