[PATCH v4 3/8] vmcore, procfs: introduce MEM_TYPE_CURRENT_KERNEL flag to distinguish objects copied in 2nd kernel

[HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>]

Later patch will copy ELF note segments in buffer on the 2nd
kernel. To handle memory on the 1st kernel (old memory) and memory on
the 2nd kernel in vmcore_list uniformly, introduce
MEM_TYPE_CURRENT_KERNEL flag. If this flag is set, the vmcore object
corresponds to buffer on the 2nd kernel.

Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
---

 include/linux/proc_fs.h |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 94dfb2a..fefead4 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -97,11 +97,17 @@ struct kcore_list {
 	int type;
 };
 
+#define MEM_TYPE_CURRENT_KERNEL 0x1
+
 struct vmcore {
 	struct list_head list;
-	unsigned long long paddr;
+	union {
+		unsigned long long paddr;
+		char *buf;
+	};
 	unsigned long long size;
 	loff_t offset;
+	unsigned int flag;
 };
 
 #ifdef CONFIG_PROC_FS