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tracing: Allow dumping traces without tracking trace started cpus

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We don't init iter->started when dumping the ftrace buffer, and there's no
real need to do so - so allow skipping that check if the iter doesn't have
an initialized ->started cpumask.

Link: http://lkml.kernel.org/r/1441385156-27279-1-git-send-email-sasha.levin@oracle.com

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Sasha Levin 2015-09-04 12:45:56 -04:00 committed by Steven Rostedt
parent f47cb66df2
commit 919cd97999
1 changed files with 3 additions and 2 deletions
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5
kernel/trace/trace.c
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@ -2671,13 +2671,14 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
if (!(iter->iter_flags & TRACE_FILE_ANNOTATE)) if (!(iter->iter_flags & TRACE_FILE_ANNOTATE))
return; return;
if (cpumask_test_cpu(iter->cpu, iter->started)) if (iter->started && cpumask_test_cpu(iter->cpu, iter->started))
return; return;
if (per_cpu_ptr(iter->trace_buffer->data, iter->cpu)->skipped_entries) if (per_cpu_ptr(iter->trace_buffer->data, iter->cpu)->skipped_entries)
return; return;
cpumask_set_cpu(iter->cpu, iter->started); if (iter->started)
cpumask_set_cpu(iter->cpu, iter->started);
/* Don't print started cpu buffer for the first entry of the trace */ /* Don't print started cpu buffer for the first entry of the trace */
if (iter->idx > 1) if (iter->idx > 1)