[PATCH] Fix IA64 success/failure indication in syscall auditing.

Original 2.6.9 patch and explanation from somewhere within HP via
bugzilla...

ia64 stores a success/failure code in r10, and the return value (normal
return, or *positive* errno) in r8. The patch also sets the exit code to
negative errno if it's a failure result for consistency with other
architectures.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

arch/ia64/kernel/ptrace.c

@@ -1656,8 +1656,14 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3,
 		     long arg4, long arg5, long arg6, long arg7,
 		     struct pt_regs regs)
 {
-	if (unlikely(current->audit_context))
-		audit_syscall_exit(current, AUDITSC_RESULT(regs.r10), regs.r8);
+	if (unlikely(current->audit_context)) {
+		int success = AUDITSC_RESULT(regs.r10);
+		long result = regs.r8;
+
+		if (success != AUDITSC_SUCCESS)
+			result = -result;
+		audit_syscall_exit(current, success, result);
+	}
 
 	if (test_thread_flag(TIF_SYSCALL_TRACE)
 	    && (current->ptrace & PT_PTRACED))