[ 07/39] tracing: Fix irqs-off tag display in syscall tracing

From: Greg Kroah-Hartman
Date: Fri Aug 02 2013 - 06:18:00 EST

3.4-stable review patch. If anyone has any objections, please let me know.


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

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@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
kernel/trace/trace_syscalls.c | 3 +++
1 file changed, 3 insertions(+)

--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -358,6 +358,9 @@ void ftrace_syscall_exit(void *ignore, s
if (!sys_data)

+ 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);

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