[PATCH] [21/28] x86: MCE: Store record length into memory struct mce anchor

[Andi Kleen]

This makes it easier for tools who want to extract the mcelog out of 
crash images or memory dumps to adapt to changing struct mce size.
The length field replaces padding, so it's fully compatible.

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

---
 arch/x86/include/asm/mce.h          |    2 +-
 arch/x86/kernel/cpu/mcheck/mce_64.c |    5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

Index: linux/arch/x86/kernel/cpu/mcheck/mce_64.c
===================================================================
--- linux.orig/arch/x86/kernel/cpu/mcheck/mce_64.c	2009-04-07 16:09:59.000000000 +0200
+++ linux/arch/x86/kernel/cpu/mcheck/mce_64.c	2009-04-07 16:43:10.000000000 +0200
@@ -94,8 +94,9 @@
  */
 
 static struct mce_log mcelog = {
-	MCE_LOG_SIGNATURE,
-	MCE_LOG_LEN,
+	.signature = MCE_LOG_SIGNATURE,
+	.len = MCE_LOG_LEN,
+	.recordlen = sizeof(struct mce),
 };
 
 void mce_log(struct mce *mce)
Index: linux/arch/x86/include/asm/mce.h
===================================================================
--- linux.orig/arch/x86/include/asm/mce.h	2009-04-07 16:09:59.000000000 +0200
+++ linux/arch/x86/include/asm/mce.h	2009-04-07 16:43:10.000000000 +0200
@@ -59,7 +59,7 @@
 	unsigned len;	    /* = MCE_LOG_LEN */
 	unsigned next;
 	unsigned flags;
-	unsigned pad0;
+	unsigned recordlen;	/* length of struct mce */
 	struct mce entry[MCE_LOG_LEN];
 };
 
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