[SPARC64]: Adjust kernel PC validation test in fault handler.

Because of the new futex validation init handler, we have
to accept faults in init section text as well as the normal
kernel text.

Thanks to Tom Callaway for the bug report.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/mm/fault.c

@@ -286,7 +286,7 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
 		unsigned long tpc = regs->tpc;
 
 		/* Sanity check the PC. */
-		if ((tpc >= KERNBASE && tpc < (unsigned long) _etext) ||
+		if ((tpc >= KERNBASE && tpc < (unsigned long) __init_end) ||
 		    (tpc >= MODULES_VADDR && tpc < MODULES_END)) {
 			/* Valid, no problems... */
 		} else {