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tracing: Add hist_data member to hist_field 

Allow hist_data access via hist_field.  Some users of hist_fields
require or will require more access to the associated hist_data.

Link: http://lkml.kernel.org/r/d04cd0768f5228ebb4ac0ba4a847bc4d14d4826f.1516069914.git.tom.zanussi@linux.intel.com

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Tom Zanussi 2018-01-15 20:51:47 -06:00 committed by Steven Rostedt (VMware)
parent 2734b62952
commit b559d003a2
1 changed files with 9 additions and 5 deletions
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14
kernel/trace/trace_events_hist.c
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@ -39,6 +39,7 @@ struct hist_field {
unsigned int offset;
unsigned int is_signed;
struct hist_field *operands[HIST_FIELD_OPERANDS_MAX];
struct hist_trigger_data *hist_data;
};
static u64 hist_field_none(struct hist_field *field, void *event,
@ -420,7 +421,8 @@ static void destroy_hist_field(struct hist_field *hist_field,
kfree(hist_field);
}
static struct hist_field *create_hist_field(struct ftrace_event_field *field,
static struct hist_field *create_hist_field(struct hist_trigger_data *hist_data,
struct ftrace_event_field *field,
unsigned long flags)
{
struct hist_field *hist_field;
@ -432,6 +434,8 @@ static struct hist_field *create_hist_field(struct ftrace_event_field *field,
if (!hist_field)
return NULL;
hist_field->hist_data = hist_data;
if (flags & HIST_FIELD_FL_HITCOUNT) {
hist_field->fn = hist_field_counter;
goto out;
@ -445,7 +449,7 @@ static struct hist_field *create_hist_field(struct ftrace_event_field *field,
if (flags & HIST_FIELD_FL_LOG2) {
unsigned long fl = flags & ~HIST_FIELD_FL_LOG2;
hist_field->fn = hist_field_log2;
hist_field->operands[0] = create_hist_field(field, fl);
hist_field->operands[0] = create_hist_field(hist_data, field, fl);
hist_field->size = hist_field->operands[0]->size;
goto out;
}
@ -498,7 +502,7 @@ static void destroy_hist_fields(struct hist_trigger_data *hist_data)
static int create_hitcount_val(struct hist_trigger_data *hist_data)
{
hist_data->fields[HITCOUNT_IDX] =
create_hist_field(NULL, HIST_FIELD_FL_HITCOUNT);
create_hist_field(hist_data, NULL, HIST_FIELD_FL_HITCOUNT);
if (!hist_data->fields[HITCOUNT_IDX])
return -ENOMEM;
@ -544,7 +548,7 @@ static int create_val_field(struct hist_trigger_data *hist_data,
}
}
hist_data->fields[val_idx] = create_hist_field(field, flags);
hist_data->fields[val_idx] = create_hist_field(hist_data, field, flags);
if (!hist_data->fields[val_idx]) {
ret = -ENOMEM;
goto out;
@ -654,7 +658,7 @@ static int create_key_field(struct hist_trigger_data *hist_data,
}
}
hist_data->fields[key_idx] = create_hist_field(field, flags);
hist_data->fields[key_idx] = create_hist_field(hist_data, field, flags);
if (!hist_data->fields[key_idx]) {
ret = -ENOMEM;
goto out;