diff options
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 31 |
1 files changed, 11 insertions, 20 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 406de9cf2820..7e7154f77009 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -200,23 +200,6 @@ unsigned long nsecs_to_usecs(unsigned long nsecs) } /* - * 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 @@ lat_print_timestamp(struct trace_seq *s, unsigned long long abs_usecs, 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 @@ trace_seq_print_cont(struct trace_seq *s, struct trace_iterator *iter) } 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 |