[RFC PATCH v2 2/3] drivers/nvdimm: export memmap of namespace to vmcoreinfo

[Li Zhijian]

Each namespace has its own memmap, it will be udpated when
namespace initializing/creating, updating, and deleting.

CC: Dan Williams <dan.j.williams@xxxxxxxxx>
CC: Vishal Verma <vishal.l.verma@xxxxxxxxx>
CC: Dave Jiang <dave.jiang@xxxxxxxxx>
CC: Ira Weiny <ira.weiny@xxxxxxxxx>
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
 drivers/nvdimm/namespace_devs.c | 2 ++
 drivers/nvdimm/pfn_devs.c       | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index c60ec0b373c5..096203e6203f 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -8,6 +8,7 @@
 #include <linux/slab.h>
 #include <linux/list.h>
 #include <linux/nd.h>
+#include <linux/crash_core.h>
 #include "nd-core.h"
 #include "pmem.h"
 #include "pfn.h"
@@ -853,6 +854,7 @@ static ssize_t size_store(struct device *dev,
 	if (rc == 0 && val == 0 && is_namespace_pmem(dev)) {
 		struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev);
 
+		devm_memmap_vmcore_delete(to_ndns(dev));
 		kfree(nspm->uuid);
 		nspm->uuid = NULL;
 	}
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index af7d9301520c..80076996b2da 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -9,6 +9,7 @@
 #include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include <linux/crash_core.h>
 #include "nd-core.h"
 #include "pfn.h"
 #include "nd.h"
@@ -716,6 +717,8 @@ static int __nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
 	} else
 		return -ENXIO;
 
+	devm_memmap_vmcore_update(ndns, altmap->base_pfn, PHYS_PFN(offset),
+				  nd_pfn->mode == PFN_MODE_PMEM);
 	return 0;
 }
 
-- 
2.29.2