Separate CONFIG_UNWIND_INFO from CONFIG_DEBUG_INFO

From: Jan Beulich <jbeulich@novell.com>

As a follow-up to the introduction of CONFIG_UNWIND_INFO, this
separates the generation of frame unwind information for x86-64 from
that of full debug information.

Signed-off-by: Andi Kleen <ak@suse.de>

Index: linux/arch/x86_64/Makefile
===================================================================
--- linux.orig/arch/x86_64/Makefile
+++ linux/arch/x86_64/Makefile
@@ -38,8 +38,10 @@ CFLAGS += -pipe
 # actually it makes the kernel smaller too.
 CFLAGS += -fno-reorder-blocks	
 CFLAGS += -Wno-sign-compare
-ifneq ($(CONFIG_DEBUG_INFO),y)
+ifneq ($(CONFIG_UNWIND_INFO),y)
 CFLAGS += -fno-asynchronous-unwind-tables
+endif
+ifneq ($(CONFIG_DEBUG_INFO),y)
 # -fweb shrinks the kernel a bit, but the difference is very small
 # it also messes up debugging, so don't use it for now.
 #CFLAGS += $(call cc-option,-fweb)
Index: linux/arch/x86_64/kernel/vmlinux.lds.S
===================================================================
--- linux.orig/arch/x86_64/kernel/vmlinux.lds.S
+++ linux/arch/x86_64/kernel/vmlinux.lds.S
@@ -189,7 +189,7 @@ SECTIONS
   /* Sections to be discarded */
   /DISCARD/ : {
 	*(.exitcall.exit)
-#ifndef CONFIG_DEBUG_INFO
+#ifndef CONFIG_UNWIND_INFO
 	*(.eh_frame)
 #endif
 	}
Index: linux/include/asm-x86_64/dwarf2.h
===================================================================
--- linux.orig/include/asm-x86_64/dwarf2.h
+++ linux/include/asm-x86_64/dwarf2.h
@@ -14,7 +14,7 @@
    away for older version. 
  */
 
-#ifdef CONFIG_DEBUG_INFO
+#ifdef CONFIG_UNWIND_INFO
 
 #define CFI_STARTPROC .cfi_startproc
 #define CFI_ENDPROC .cfi_endproc