x86, mce: support more than 256 CPUs in struct mce

The old struct mce had a limitation to 256 CPUs. But x86 Linux supports
more than that now with x2apic. Add a new field extcpu to report the
extended number.

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>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 0a61946d4396..b4a04b60b740 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -40,9 +40,9 @@ struct mce {
         __u64 res2;     /* dito. */
         __u8  cs;               /* code segment */
         __u8  bank;     /* machine check bank */
-        __u8  cpu;      /* cpu that raised the error */
+        __u8  cpu;      /* cpu number; obsolete; use extcpu now */
         __u8  finished;   /* entry is valid */
-        __u32 pad;
+        __u32 extcpu;   /* linux cpu number that detected the error */
 };
 
 /*