do_div() takes a u64. The mips build warns:

In file included from include/trace/ftrace.h:635,
                 from include/trace/define_trace.h:61,
                 from include/trace/events/lockdep.h:96,
                 from kernel/lockdep.c:52:
include/trace/events/lockdep.h: In function `ftrace_raw_event_lock_acquired':
include/trace/events/lockdep.h:71: warning: comparison of distinct pointer types lacks a cast

from the check in include/asm-generic/div64.h:do_div().

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/trace/events/lockdep.h

@@ -69,7 +69,7 @@ TRACE_EVENT(lock_contended,
 );
 
 TRACE_EVENT(lock_acquired,
-	TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
+	TP_PROTO(struct lockdep_map *lock, unsigned long ip, u64 waittime),
 
 	TP_ARGS(lock, ip, waittime),