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Diffstat (limited to 'kernel/trace/trace.c')
-rw-r--r--kernel/trace/trace.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1c69ca1f1088..2b64b3ec67d9 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5501,6 +5501,10 @@ static const struct file_operations tracing_iter_fops = {
static const char readme_msg[] =
"tracing mini-HOWTO:\n\n"
+ "By default tracefs removes all OTH file permission bits.\n"
+ "When mounting tracefs an optional group id can be specified\n"
+ "which adds the group to every directory and file in tracefs:\n\n"
+ "\t e.g. mount -t tracefs [-o [gid=<gid>]] nodev /sys/kernel/tracing\n\n"
"# echo 0 > tracing_on : quick way to disable tracing\n"
"# echo 1 > tracing_on : quick way to re-enable tracing\n\n"
" Important files:\n"
@@ -10621,10 +10625,10 @@ __init static void enable_instances(void)
* cannot be deleted by user space, so keep the reference
* to it.
*/
- if (start)
+ if (start) {
tr->flags |= TRACE_ARRAY_FL_BOOT;
- else
- trace_array_put(tr);
+ tr->ref++;
+ }
while ((tok = strsep(&curr_str, ","))) {
early_enable_events(tr, tok, true);