This is a note to let you know that I've just added the patch titled
lockdep: fix order in trace_hardirqs_off_caller()
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
lockdep-fix-order-in-trace_hardirqs_off_caller.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f1dc551931ac1a269b3884234d13518ffcc502d1
Author: Sven Schnelle <svens@xxxxxxxxxxxxx>
Date: Thu Sep 10 12:24:53 2020 +0200
lockdep: fix order in trace_hardirqs_off_caller()
[ Upstream commit 73ac74c7d489756d2313219a108809921dbfaea1 ]
Switch order so that locking state is consistent even
if the IRQ tracer calls into lockdep again.
Acked-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Sven Schnelle <svens@xxxxxxxxxxxxx>
Signed-off-by: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c
index 71f553cceb3c1..0e373cb0106bb 100644
--- a/kernel/trace/trace_preemptirq.c
+++ b/kernel/trace/trace_preemptirq.c
@@ -59,14 +59,14 @@ EXPORT_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);
#endif /* CONFIG_TRACE_IRQFLAGS */
