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authorSasha Levin <sasha.levin@oracle.com>2015-09-04 19:45:56 +0300
committerSteven Rostedt <rostedt@goodmis.org>2015-11-04 00:10:08 +0300
commit919cd9799936843d0af4f0904a3e39e70294c4d8 (patch)
tree0ee313042508d083077aa384c4983716f717a240 /kernel/trace
parentf47cb66df2f89dd1f796742c64f9ead77e548a6a (diff)
downloadlinux-919cd9799936843d0af4f0904a3e39e70294c4d8.tar.xz
tracing: Allow dumping traces without tracking trace started cpus
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>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 67873c67665e..6459e141aac3 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2671,13 +2671,14 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
if (!(iter->iter_flags & TRACE_FILE_ANNOTATE))
return;
- if (cpumask_test_cpu(iter->cpu, iter->started))
+ if (iter->started && cpumask_test_cpu(iter->cpu, iter->started))
return;
if (per_cpu_ptr(iter->trace_buffer->data, iter->cpu)->skipped_entries)
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 */
if (iter->idx > 1)