linux-kernel - [PATCH 04/13] vmcore: introduce types for objects copied in 2nd kernel

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Message-ID: <20130214101205.22466.5909.stgit@localhost6.localdomain6>
Date:	Thu, 14 Feb 2013 19:12:05 +0900
From:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
To:	ebiederm@...ssion.com, vgoyal@...hat.com, cpw@....com,
	kumagai-atsushi@....nes.nec.co.jp, lisa.mitchell@...com
Cc:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 04/13] vmcore: introduce types for objects copied in 2nd kernel

Some parts of old memory need to be copied in buffers on 2nd kernel to
be remapped to user-space. To distinguish objects in the buffer on 2nd
kernel and the ones on old memory, enum vmcore_type is introduced: the
object in the buffer on 2nd kernel has VMCORE_2ND_KERNEL type, and the
one on old memory has VMCORE_OLD_MEMORY type.

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

 include/linux/proc_fs.h |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 32676b3..4b153ed 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -97,11 +97,20 @@ struct kcore_list {
 	int type;
 };
 
+enum vmcore_type {
+	VMCORE_OLD_MEMORY,
+	VMCORE_2ND_KERNEL,
+};
+
 struct vmcore {
 	struct list_head list;
-	unsigned long long paddr;
+	union {
+		unsigned long long paddr;
+		char *buf;
+	};
 	unsigned long long size;
 	loff_t offset;
+	enum vmcore_type type;
 };
 
 #ifdef CONFIG_PROC_FS

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