mmiotrace: handle TRACE_PRINT entries

Also make trace_seq_print_cont() non-static, and add a newline if the
seq buffer can't hold all data.

Signed-off-by: Pekka Paalanen <pq@iki.fi>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 19 insertions, 0 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index be3b3cf95f4b..648433d18ccb 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -72,6 +72,23 @@ struct print_entry {
 };
 
 /*
+ * trace_flag_type is an enumeration that holds different
+ * states when a trace occurs. These are:
+ *  IRQS_OFF    - interrupts were disabled
+ *  NEED_RESCED - reschedule is requested
+ *  HARDIRQ     - inside an interrupt handler
+ *  SOFTIRQ     - inside a softirq handler
+ *  CONT        - multiple entries hold the trace item
+ */
+enum trace_flag_type {
+        TRACE_FLAG_IRQS_OFF             = 0x01,
+        TRACE_FLAG_NEED_RESCHED         = 0x02,
+        TRACE_FLAG_HARDIRQ              = 0x04,
+        TRACE_FLAG_SOFTIRQ              = 0x08,
+        TRACE_FLAG_CONT                 = 0x10,
+};
+
+/*
  * The trace field - the most basic unit of tracing. This is what
  * is printed in the end as a single line in the trace output, such as:
  *
@@ -330,6 +347,8 @@ extern int trace_selftest_startup_sysprof(struct tracer *trace,
 
 extern void *head_page(struct trace_array_cpu *data);
 extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
+extern void trace_seq_print_cont(struct trace_seq *s,
+                                 struct trace_iterator *iter);
 extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
                                  size_t cnt);
 extern long ns2usecs(cycle_t nsec);