xtensa: Move EXCEPTION_TABLE to RO_DATA segment

Since the EXCEPTION_TABLE is read-only, collapse it into RO_DATA.

Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Max Filippov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Chris Zankel <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Rick Edgecombe <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: x86-ml <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

Author: kees

arch/xtensa/kernel/vmlinux.lds.S

@@ -14,6 +14,8 @@
  * Joe Taylor <[email protected], [email protected]>
  */
 
+#define RO_EXCEPTION_TABLE_ALIGN	16
+
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/page.h>
 #include <asm/thread_info.h>
@@ -130,7 +132,6 @@ SECTIONS
 
   .fixup   : { *(.fixup) }
 
-  EXCEPTION_TABLE(16)
   /* Data section */
 
   _sdata = .;