1 files changed, 11 insertions, 12 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5c38c81496ce..31e4f55773f1 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -328,7 +328,7 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait);
 unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
         TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME |
         TRACE_ITER_GRAPH_TIME | TRACE_ITER_RECORD_CMD | TRACE_ITER_OVERWRITE |
-        TRACE_ITER_IRQ_INFO;
+        TRACE_ITER_IRQ_INFO | TRACE_ITER_MARKERS;
 
 static int trace_stop_count;
 static DEFINE_RAW_SPINLOCK(tracing_start_lock);
@@ -426,15 +426,15 @@ __setup("trace_buf_size=", set_buf_size);
 
 static int __init set_tracing_thresh(char *str)
 {
-        unsigned long threshhold;
+        unsigned long threshold;
         int ret;
 
         if (!str)
                 return 0;
-        ret = strict_strtoul(str, 0, &threshhold);
+        ret = strict_strtoul(str, 0, &threshold);
         if (ret < 0)
                 return 0;
-        tracing_thresh = threshhold * 1000;
+        tracing_thresh = threshold * 1000;
         return 1;
 }
 __setup("tracing_thresh=", set_tracing_thresh);
@@ -470,6 +470,7 @@ static const char *trace_options[] = {
         "overwrite",
         "disable_on_free",
         "irq-info",
+        "markers",
         NULL
 };
 
@@ -2060,7 +2061,8 @@ print_trace_header(struct seq_file *m, struct trace_iterator *iter)
         seq_puts(m, "#    -----------------\n");
         seq_printf(m, "#    | task: %.16s-%d "
                    "(uid:%d nice:%ld policy:%ld rt_prio:%ld)\n",
-                   data->comm, data->pid, data->uid, data->nice,
+                   data->comm, data->pid,
+                   from_kuid_munged(seq_user_ns(m), data->uid), data->nice,
                    data->policy, data->rt_priority);
         seq_puts(m, "#    -----------------\n");
 
@@ -3886,6 +3888,9 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
         if (tracing_disabled)
                 return -EINVAL;
 
+        if (!(trace_flags & TRACE_ITER_MARKERS))
+                return -EINVAL;
+
         if (cnt > TRACE_BUF_SIZE)
                 cnt = TRACE_BUF_SIZE;
 
@@ -4195,12 +4200,6 @@ static void buffer_pipe_buf_release(struct pipe_inode_info *pipe,
         buf->private = 0;
 }
 
-static int buffer_pipe_buf_steal(struct pipe_inode_info *pipe,
-                                 struct pipe_buffer *buf)
-{
-        return 1;
-}
-
 static void buffer_pipe_buf_get(struct pipe_inode_info *pipe,
                                 struct pipe_buffer *buf)
 {
@@ -4216,7 +4215,7 @@ static const struct pipe_buf_operations buffer_pipe_buf_ops = {
         .unmap                  = generic_pipe_buf_unmap,
         .confirm                = generic_pipe_buf_confirm,
         .release                = buffer_pipe_buf_release,
-        .steal                  = buffer_pipe_buf_steal,
+        .steal                  = generic_pipe_buf_steal,
         .get                    = buffer_pipe_buf_get,
 };