diff options
| author | Tom Zanussi <tom.zanussi@linux.intel.com> | 2018-12-18 23:33:24 +0300 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-12-22 16:21:05 +0300 |
| commit | 656fe2ba85e81d00e4447bf77b8da2be3c47acb2 (patch) | |
| tree | caf323c2a2745a4b87ec2561b3183336f56c9e5a /kernel | |
| parent | de40f033d4e84e843d6a12266e3869015ea9097c (diff) | |
| download | linux-656fe2ba85e81d00e4447bf77b8da2be3c47acb2.tar.xz | |
tracing: Use hist trigger's var_ref array to destroy var_refs
Since every var ref for a trigger has an entry in the var_ref[] array,
use that to destroy the var_refs, instead of piecemeal via the field
expressions.
This allows us to avoid having to keep and treat differently separate
lists for the action-related references, which future patches will
remove.
Link: http://lkml.kernel.org/r/fad1a164f0e257c158e70d6eadbf6c586e04b2a2.1545161087.git.tom.zanussi@linux.intel.com
Acked-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 6309f4dbfb9c..923c572ee68d 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -2190,6 +2190,15 @@ static int contains_operator(char *str) return field_op; } +static void __destroy_hist_field(struct hist_field *hist_field) +{ + kfree(hist_field->var.name); + kfree(hist_field->name); + kfree(hist_field->type); + + kfree(hist_field); +} + static void destroy_hist_field(struct hist_field *hist_field, unsigned int level) { @@ -2201,14 +2210,13 @@ static void destroy_hist_field(struct hist_field *hist_field, if (!hist_field) return; + if (hist_field->flags & HIST_FIELD_FL_VAR_REF) + return; /* var refs will be destroyed separately */ + for (i = 0; i < HIST_FIELD_OPERANDS_MAX; i++) destroy_hist_field(hist_field->operands[i], level + 1); - kfree(hist_field->var.name); - kfree(hist_field->name); - kfree(hist_field->type); - - kfree(hist_field); + __destroy_hist_field(hist_field); } static struct hist_field *create_hist_field(struct hist_trigger_data *hist_data, @@ -2335,6 +2343,12 @@ static void destroy_hist_fields(struct hist_trigger_data *hist_data) hist_data->fields[i] = NULL; } } + + for (i = 0; i < hist_data->n_var_refs; i++) { + WARN_ON(!(hist_data->var_refs[i]->flags & HIST_FIELD_FL_VAR_REF)); + __destroy_hist_field(hist_data->var_refs[i]); + hist_data->var_refs[i] = NULL; + } } static int init_var_ref(struct hist_field *ref_field, |