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| author | Dan Williams <dan.j.williams@intel.com> | 2017-05-30 09:12:19 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-06-28 02:44:13 +0300 |
| commit | c9e582aa689f5418ca30e1e7a975039772c3a757 (patch) | |
| tree | 34ea0b661819d2e80c80a2197ad264e55b0fffc6 /drivers/acpi/nfit | |
| parent | c00b396ef782cb2296200d868a0013d8ca1d615e (diff) | |
| download | linux-c9e582aa689f5418ca30e1e7a975039772c3a757.tar.xz | |
libnvdimm, nfit: enable support for volatile ranges
Allow volatile nfit ranges to participate in all the same infrastructure
provided for persistent memory regions. A resulting resulting namespace
device will still be called "pmem", but the parent region type will be
"nd_volatile". This is in preparation for disabling the dax ->flush()
operation in the pmem driver when it is hosted on a volatile range.
Cc: Jan Kara <jack@suse.cz>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi/nfit')
| -rw-r--r-- | drivers/acpi/nfit/core.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index ac2436538b7e..60d1ca149cc1 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -2227,6 +2227,13 @@ static bool nfit_spa_is_virtual(struct acpi_nfit_system_address *spa) nfit_spa_type(spa) == NFIT_SPA_PCD); } +static bool nfit_spa_is_volatile(struct acpi_nfit_system_address *spa) +{ + return (nfit_spa_type(spa) == NFIT_SPA_VDISK || + nfit_spa_type(spa) == NFIT_SPA_VCD || + nfit_spa_type(spa) == NFIT_SPA_VOLATILE); +} + static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, struct nfit_spa *nfit_spa) { @@ -2301,7 +2308,7 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, ndr_desc); if (!nfit_spa->nd_region) rc = -ENOMEM; - } else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE) { + } else if (nfit_spa_is_volatile(spa)) { nfit_spa->nd_region = nvdimm_volatile_region_create(nvdimm_bus, ndr_desc); if (!nfit_spa->nd_region) |