diff options
| author |   Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2015-02-03 11:56:20 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2015-02-03 12:48:38 -0500 |
| commit | 0f67f04ffcb592d065a20862a82d4539e0f8e909 (patch) | |
| tree | f4c574d454ecd79054291cf2ed868706a4501fd6 /kernel/trace | |
| parent | Merge branch 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into trace/ftrace/tracefs (diff) | |
| download | linux-dev-0f67f04ffcb592d065a20862a82d4539e0f8e909.tar.xz linux-dev-0f67f04ffcb592d065a20862a82d4539e0f8e909.zip | |
tracing: Only create tracer options files if directory exists
Do not bother creating tracer options if no tracing directory
exists. If a tracer is enabled via the command line, and is
started before the tracing directory is created, then it wont have
its tracer specific options created.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 38c613ede10d..d4627f15407a 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4172,8 +4172,11 @@ static int tracing_set_tracer(struct trace_array *tr, const char *buf) free_snapshot(tr); } #endif - /* Currently, only the top instance has options */ - if (tr->flags & TRACE_ARRAY_FL_GLOBAL) { + /* + * Only enable if the directory has been created already. + * Currently, only the top instance has options + */ + if (tr->dir && tr->flags & TRACE_ARRAY_FL_GLOBAL) { destroy_trace_option_files(topts); topts = create_trace_option_files(tr, t); } |