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Code Issues Releases Wiki Activity

tracing histograms: Simplify parse_actions() function 

The parse_actions() function uses 'len = str_has_prefix()' to test which
action is in the string being parsed. But then it goes and repeats the
logic for each different action. This logic can be simplified and
duplicate code can be removed as 'len' contains the length of the found
prefix which should be used for all actions.

Link: https://lore.kernel.org/all/20240107112044.6702cb66@gandalf.local.home/
Link: https://lore.kernel.org/linux-trace-kernel/20240107203258.37e26d2b@gandalf.local.home

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andy Shevchenko <andy@kernel.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Google) 2024-01-07 20:32:58 -05:00
parent 2654769110
commit 4f1991a92c
1 changed files with 24 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
kernel/trace/trace_events_hist.c
View File

@ -4805,36 +4805,35 @@ static int parse_actions(struct hist_trigger_data *hist_data)
int len;
for (i = 0; i < hist_data->attrs->n_actions; i++) {
enum handler_id hid = 0;
char *action_str;
str = hist_data->attrs->action_str[i];
if ((len = str_has_prefix(str, "onmatch("))) {
char *action_str = str + len;
if ((len = str_has_prefix(str, "onmatch(")))
hid = HANDLER_ONMATCH;
else if ((len = str_has_prefix(str, "onmax(")))
hid = HANDLER_ONMAX;
else if ((len = str_has_prefix(str, "onchange(")))
hid = HANDLER_ONCHANGE;
action_str = str + len;
switch (hid) {
case HANDLER_ONMATCH:
data = onmatch_parse(tr, action_str);
if (IS_ERR(data)) {
ret = PTR_ERR(data);
break;
}
} else if ((len = str_has_prefix(str, "onmax("))) {
char *action_str = str + len;
break;
case HANDLER_ONMAX:
case HANDLER_ONCHANGE:
data = track_data_parse(hist_data, action_str, hid);
break;
default:
data = ERR_PTR(-EINVAL);
break;
}
data = track_data_parse(hist_data, action_str,
HANDLER_ONMAX);
if (IS_ERR(data)) {
ret = PTR_ERR(data);
break;
}
} else if ((len = str_has_prefix(str, "onchange("))) {
char *action_str = str + len;
data = track_data_parse(hist_data, action_str,
HANDLER_ONCHANGE);
if (IS_ERR(data)) {
ret = PTR_ERR(data);
break;
}
} else {
ret = -EINVAL;
if (IS_ERR(data)) {
ret = PTR_ERR(data);
break;
}