From 32ab0a3f51701cb37ab960635254d5f84ec3de0a Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Sat, 1 Aug 2015 02:16:37 -0400
Subject: libnvdimm, pmem: 'struct page' for pmem

Enable the pmem driver to handle PFN device instances.  Attaching a pmem
namespace to a pfn device triggers the driver to allocate and initialize
struct page entries for pmem.  Memory capacity for this allocation comes
exclusively from RAM for now which is suitable for low PMEM to RAM
ratios.  This mechanism will be expanded later for setting an "allocate
from PMEM" policy.

Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/nvdimm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/nvdimm/Kconfig')

diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig
index ace25b53b755..53c11621d5b1 100644
--- a/drivers/nvdimm/Kconfig
+++ b/drivers/nvdimm/Kconfig
@@ -76,6 +76,7 @@ config ND_PFN
 config NVDIMM_PFN
 	bool "PFN: Map persistent (device) memory"
 	default LIBNVDIMM
+	depends on ZONE_DEVICE
 	select ND_CLAIM
 	help
 	  Map persistent memory, i.e. advertise it to the memory
-- 
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