[ 05/23] tracing: Fix irqs-off tag display in syscall tracing

Greg Kroah-Hartman
2013-08-02T10:22:45Z

From: "zhangwei(Jovi)" <jovi.zhangwei@huawei.com>

commit 11034ae9c20f4057a6127fc965906417978e69b2 upstream

Initialization of variable irq_flags and pc was missed when backport
11034ae9c to linux-3.0.y and linux-3.4.y, my fault.

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/trace/trace_syscalls.c | 3 +++
1 file changed, 3 insertions(+)

--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -357,6 +357,9 @@ void ftrace_syscall_exit(void *ignore, s
if (!sys_data)
return;

+ local_save_flags(irq_flags);
+ pc = preempt_count();
+
event = trace_current_buffer_lock_reserve(&buffer,
sys_data->exit_event->event.type, sizeof(*entry),
irq_flags, pc);