From b5685aede3b7b65e72ddc73b951aa1f70798a614 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Mon, 12 May 2008 21:20:58 +0200 Subject: [PATCH] ftrace: restore iterator trace in pipe read The trace iterator is reset in the read. We still need to restore the tracer that the trace_pipe was opened with. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- kernel/trace/trace.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index fd4ecc292005..d141fc98f3a8 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2202,6 +2202,8 @@ tracing_read_pipe(struct file *filp, char __user *ubuf, { struct trace_iterator *iter = filp->private_data; struct trace_array_cpu *data; + struct trace_array *tr = iter->tr; + struct tracer *tracer = iter->trace; static cpumask_t mask; static int start; unsigned long flags; @@ -2274,7 +2276,8 @@ tracing_read_pipe(struct file *filp, char __user *ubuf, cnt = PAGE_SIZE - 1; memset(iter, 0, sizeof(*iter)); - iter->tr = &global_trace; + iter->tr = tr; + iter->trace = tracer; iter->pos = -1; /* -- 2.39.2