diff options
Diffstat (limited to 'drivers/dax')
| -rw-r--r-- | drivers/dax/device.c | 2 | ||||
| -rw-r--r-- | drivers/dax/pmem.c | 20 | ||||
| -rw-r--r-- | drivers/dax/super.c | 10 |
3 files changed, 22 insertions, 10 deletions
diff --git a/drivers/dax/device.c b/drivers/dax/device.c index 7b0bf825c4e7..2137dbc29877 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -133,7 +133,7 @@ struct dax_region *alloc_dax_region(struct device *parent, int region_id, dax_region->base = addr; if (sysfs_create_groups(&parent->kobj, dax_region_attribute_groups)) { kfree(dax_region); - return NULL;; + return NULL; } kref_get(&dax_region->kref); diff --git a/drivers/dax/pmem.c b/drivers/dax/pmem.c index 8d8c852ba8f2..31b6ecce4c64 100644 --- a/drivers/dax/pmem.c +++ b/drivers/dax/pmem.c @@ -21,6 +21,7 @@ struct dax_pmem { struct device *dev; struct percpu_ref ref; + struct dev_pagemap pgmap; struct completion cmp; }; @@ -69,20 +70,23 @@ static int dax_pmem_probe(struct device *dev) struct nd_namespace_common *ndns; struct nd_dax *nd_dax = to_nd_dax(dev); struct nd_pfn *nd_pfn = &nd_dax->nd_pfn; - struct vmem_altmap __altmap, *altmap = NULL; ndns = nvdimm_namespace_common_probe(dev); if (IS_ERR(ndns)) return PTR_ERR(ndns); nsio = to_nd_namespace_io(&ndns->dev); + dax_pmem = devm_kzalloc(dev, sizeof(*dax_pmem), GFP_KERNEL); + if (!dax_pmem) + return -ENOMEM; + /* parse the 'pfn' info block via ->rw_bytes */ rc = devm_nsio_enable(dev, nsio); if (rc) return rc; - altmap = nvdimm_setup_pfn(nd_pfn, &res, &__altmap); - if (IS_ERR(altmap)) - return PTR_ERR(altmap); + rc = nvdimm_setup_pfn(nd_pfn, &dax_pmem->pgmap); + if (rc) + return rc; devm_nsio_disable(dev, nsio); pfn_sb = nd_pfn->pfn_sb; @@ -94,10 +98,6 @@ static int dax_pmem_probe(struct device *dev) return -EBUSY; } - dax_pmem = devm_kzalloc(dev, sizeof(*dax_pmem), GFP_KERNEL); - if (!dax_pmem) - return -ENOMEM; - dax_pmem->dev = dev; init_completion(&dax_pmem->cmp); rc = percpu_ref_init(&dax_pmem->ref, dax_pmem_percpu_release, 0, @@ -110,7 +110,8 @@ static int dax_pmem_probe(struct device *dev) if (rc) return rc; - addr = devm_memremap_pages(dev, &res, &dax_pmem->ref, altmap); + dax_pmem->pgmap.ref = &dax_pmem->ref; + addr = devm_memremap_pages(dev, &dax_pmem->pgmap); if (IS_ERR(addr)) return PTR_ERR(addr); @@ -120,6 +121,7 @@ static int dax_pmem_probe(struct device *dev) return rc; /* adjust the dax_region resource to the start of data */ + memcpy(&res, &dax_pmem->pgmap.res, sizeof(res)); res.start += le64_to_cpu(pfn_sb->dataoff); rc = sscanf(dev_name(&ndns->dev), "namespace%d.%d", ®ion_id, &id); diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 3ec804672601..473af694ad1c 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -15,6 +15,7 @@ #include <linux/mount.h> #include <linux/magic.h> #include <linux/genhd.h> +#include <linux/pfn_t.h> #include <linux/cdev.h> #include <linux/hash.h> #include <linux/slab.h> @@ -123,6 +124,15 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize) return len < 0 ? len : -EIO; } + if ((IS_ENABLED(CONFIG_FS_DAX_LIMITED) && pfn_t_special(pfn)) + || pfn_t_devmap(pfn)) + /* pass */; + else { + pr_debug("VFS (%s): error: dax support not enabled\n", + sb->s_id); + return -EOPNOTSUPP; + } + return 0; } EXPORT_SYMBOL_GPL(__bdev_dax_supported); |