[IA64] Sanitize assembler code for ia64_sal_os_state

struct ia64_sal_os_state has three semi-independent sections.  The code
in mca_asm.S assumes that these three sections are contiguous, which
makes it very awkward to add new data to this structure.  Remove the
assumption that the sections are contiguous.  Define a macro to shorten
references to offsets in ia64_sal_os_state.

This patch does not change the way that the code behaves.  It just
makes it easier to update the code in future and to add fields to
ia64_sal_os_state when debugging the MCA/INIT handlers.

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

arch/ia64/kernel/asm-offsets.c

@@ -217,16 +217,24 @@ void foo(void)
 	DEFINE(IA64_MCA_CPU_INIT_STACK_OFFSET,
 	       offsetof (struct ia64_mca_cpu, init_stack));
 	BLANK();
-	DEFINE(IA64_SAL_OS_STATE_COMMON_OFFSET,
-	       offsetof (struct ia64_sal_os_state, sal_ra));
 	DEFINE(IA64_SAL_OS_STATE_OS_GP_OFFSET,
 	       offsetof (struct ia64_sal_os_state, os_gp));
-	DEFINE(IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET,
-	       offsetof (struct ia64_sal_os_state, pal_min_state));
 	DEFINE(IA64_SAL_OS_STATE_PROC_STATE_PARAM_OFFSET,
 	       offsetof (struct ia64_sal_os_state, proc_state_param));
+	DEFINE(IA64_SAL_OS_STATE_SAL_RA_OFFSET,
+	       offsetof (struct ia64_sal_os_state, sal_ra));
+	DEFINE(IA64_SAL_OS_STATE_SAL_GP_OFFSET,
+	       offsetof (struct ia64_sal_os_state, sal_gp));
+	DEFINE(IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET,
+	       offsetof (struct ia64_sal_os_state, pal_min_state));
+	DEFINE(IA64_SAL_OS_STATE_OS_STATUS_OFFSET,
+	       offsetof (struct ia64_sal_os_state, os_status));
+	DEFINE(IA64_SAL_OS_STATE_CONTEXT_OFFSET,
+	       offsetof (struct ia64_sal_os_state, context));
 	DEFINE(IA64_SAL_OS_STATE_SIZE,
 	       sizeof (struct ia64_sal_os_state));
+	BLANK();
+
 	DEFINE(IA64_PMSA_GR_OFFSET,
 	       offsetof (struct pal_min_state_area_s, pmsa_gr));
 	DEFINE(IA64_PMSA_BANK1_GR_OFFSET,