[PATCH v3 07/21] vmcore, procfs: introduce a flag to distinguish objects copied in 2nd kernel

[HATAYAMA Daisuke]

The part of dump target memory is copied into the 2nd kernel if it
doesn't satisfy mmap()'s page-size boundary requirement. To
distinguish such copied object from usual old memory, a flag
MEM_TYPE_CURRENT_KERNEL is introduced. If this flag is set, the object
is considered being copied into buffer on the 2nd kernel.

Signed-off-by: HATAYAMA Daisuke <d.hatayama at 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 8307f2f..11dd592 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