[IA64] MCA/INIT: add an extra thread_info flag

Add an extra thread_info flag to indicate the special MCA/INIT stacks.
Mainly for debuggers.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 3 insertions, 1 deletions

diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index c8766def9ee6..fc544929ac34 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -119,7 +119,7 @@ struct pt_regs {
         unsigned long ar_unat;          /* interrupted task's NaT register (preserved) */
         unsigned long ar_pfs;           /* prev function state  */
         unsigned long ar_rsc;           /* RSE configuration */
-        /* The following two are valid only if cr_ipsr.cpl > 0: */
+        /* The following two are valid only if cr_ipsr.cpl > 0 || ti->flags & _TIF_MCA_INIT */
         unsigned long ar_rnat;          /* RSE NaT */
         unsigned long ar_bspstore;      /* RSE bspstore */
 
diff --git a/include/asm-ia64/thread_info.h b/include/asm-ia64/thread_info.h
index b2c79f0694f8..cf4a950a0f4f 100644
--- a/include/asm-ia64/thread_info.h
+++ b/include/asm-ia64/thread_info.h
@@ -76,6 +76,7 @@ struct thread_info {
 #define TIF_SIGDELAYED          5       /* signal delayed from MCA/INIT/NMI/PMI context */
 #define TIF_POLLING_NRFLAG      16      /* true if poll_idle() is polling TIF_NEED_RESCHED */
 #define TIF_MEMDIE              17
+#define TIF_MCA_INIT            18      /* this task is processing MCA or INIT */
 
 #define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
 #define _TIF_SYSCALL_AUDIT      (1 << TIF_SYSCALL_AUDIT)
@@ -85,6 +86,7 @@ struct thread_info {
 #define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
 #define _TIF_SIGDELAYED (1 << TIF_SIGDELAYED)
 #define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
+#define _TIF_MCA_INIT           (1 << TIF_MCA_INIT)
 
 /* "work to do on user-return" bits */
 #define TIF_ALLWORK_MASK        (_TIF_NOTIFY_RESUME|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SIGDELAYED)