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>
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 406de9c..7e7154f 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -200,23 +200,6 @@
}
/*
- * 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,
-};
-
-/*
* TRACE_ITER_SYM_MASK masks the options in trace_flags that
* control the output of kernel symbols.
*/
@@ -1517,12 +1500,16 @@
static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
-static void
-trace_seq_print_cont(struct trace_seq *s, struct trace_iterator *iter)
+/*
+ * The message is supposed to contain an ending newline.
+ * If the printing stops prematurely, try to add a newline of our own.
+ */
+void trace_seq_print_cont(struct trace_seq *s, struct trace_iterator *iter)
{
struct trace_array *tr = iter->tr;
struct trace_array_cpu *data = tr->data[iter->cpu];
struct trace_entry *ent;
+ bool ok = true;
ent = trace_entry_idx(tr, data, iter, iter->cpu);
if (!ent || ent->type != TRACE_CONT) {
@@ -1531,10 +1518,14 @@
}
do {
- trace_seq_printf(s, "%s", ent->cont.buf);
+ if (ok)
+ ok = (trace_seq_printf(s, "%s", ent->cont.buf) > 0);
__trace_iterator_increment(iter, iter->cpu);
ent = trace_entry_idx(tr, data, iter, iter->cpu);
} while (ent && ent->type == TRACE_CONT);
+
+ if (!ok)
+ trace_seq_putc(s, '\n');
}
static int