[IA64] Proper handling of TLB errors from duplicate itr.d dropins

Jack Steiner noticed that duplicate TLB DTC entries do not cause a
linux panic.  See discussion:

http://www.gelato.unsw.edu.au/archives/linux-ia64/0307/6108.html

The current TLB recovery code is recovering from the duplicate itr.d
dropins, masking the underlying problem.  This change modifies
the MCA recovery code to look for the TLB check signature of the
duplicate TLB entry and panic in that case.

Signed-off-by: Russ Anderson (rja@sgi.com)
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-ia64/pal.h b/include/asm-ia64/pal.h
index e43021a99a20..67656ce767c2 100644
--- a/include/asm-ia64/pal.h
+++ b/include/asm-ia64/pal.h
@@ -371,6 +371,7 @@ typedef u64					pal_mc_info_index_t;
                                                          * dependent
                                                          */
 
+#define PAL_TLB_CHECK_OP_PURGE                  8
 
 typedef struct pal_process_state_info_s {
         u64             reserved1       : 2,