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authorSteven Rostedt2008-05-12 21:20:58 +0200
committerThomas Gleixner2008-05-23 21:46:53 +0200
commitb5685aede3b7b65e72ddc73b951aa1f70798a614 (patch)
tree12d198a161c360ed900db504067a46c4662eb21a
parent8487c23765b6e0444ec6b5f1530766d63fe68e35 (diff)
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 <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--kernel/trace/trace.c5
1 files changed, 4 insertions, 1 deletions
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;
/*