x86, mce: store record length into memory struct mce anchor

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@linux.intel.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
git-mirror · Jun 3, 2009 · f6fb0ac · f6fb0ac
1 parent ca84f69
commit f6fb0ac
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Showing 2 changed files with 4 additions and 3 deletions.
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
@@ -59,7 +59,7 @@ struct mce_log {
 	unsigned len;	    /* = MCE_LOG_LEN */
 	unsigned next;
 	unsigned flags;
-	unsigned pad0;
+	unsigned recordlen;	/* length of struct mce */
 	struct mce entry[MCE_LOG_LEN];
 };
 

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -108,8 +108,9 @@ EXPORT_PER_CPU_SYMBOL_GPL(injectm);
  */
 
 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)