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authorDan Williams <dan.j.williams@intel.com>2017-05-29 23:12:19 -0700
committerDan Williams <dan.j.williams@intel.com>2017-06-27 16:44:13 -0700
commitc9e582aa689f5418ca30e1e7a975039772c3a757 (patch)
tree34ea0b661819d2e80c80a2197ad264e55b0fffc6 /drivers/acpi
parentc00b396ef782cb2296200d868a0013d8ca1d615e (diff)
downloadlinux-c9e582aa689f5418ca30e1e7a975039772c3a757.tar.bz2
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')
-rw-r--r--drivers/acpi/nfit/core.c9
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)