xtensa: fix oprofile building as module

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>

arch/xtensa/kernel/xtensa_ksyms.c

@@ -119,3 +119,8 @@ EXPORT_SYMBOL(outsl);
 EXPORT_SYMBOL(insb);
 EXPORT_SYMBOL(insw);
 EXPORT_SYMBOL(insl);
+
+extern long common_exception_return;
+extern long _spill_registers;
+EXPORT_SYMBOL(common_exception_return);
+EXPORT_SYMBOL(_spill_registers);

arch/xtensa/oprofile/backtrace.c

@@ -132,9 +132,7 @@ static void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth)
 		pc = MAKE_PC_FROM_RA(a0, pc);
 
 		/* Add the PC to the trace. */
-		if (kernel_text_address(pc))
 		oprofile_add_trace(pc);
-
 		if (pc == (unsigned long) &common_exception_return) {
 			regs = (struct pt_regs *)a1;
 			if (user_mode(regs)) {