lockdep: fix order in trace_hardirqs_off_caller()

Switch order so that locking state is consistent even
if the IRQ tracer calls into lockdep again.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c
index f10073e..f493804 100644 (file)
--- a/kernel/trace/trace_preemptirq.c
+++ b/kernel/trace/trace_preemptirq.c
@@ -102,14 +102,14 @@ NOKPROBE_SYMBOL(trace_hardirqs_on_caller);
 
 __visible void trace_hardirqs_off_caller(unsigned long caller_addr)
 {
+       lockdep_hardirqs_off(CALLER_ADDR0);
+
        if (!this_cpu_read(tracing_irq_cpu)) {
                this_cpu_write(tracing_irq_cpu, 1);
                tracer_hardirqs_off(CALLER_ADDR0, caller_addr);
                if (!in_nmi())
                        trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
        }
-
-       lockdep_hardirqs_off(CALLER_ADDR0);
 }
 EXPORT_SYMBOL(trace_hardirqs_off_caller);
 NOKPROBE_SYMBOL(trace_hardirqs_off_caller);