[PATCH v2] tracing: Point constant hist field type to string literal

[Yu Peng]

The HIST_FIELD_FL_CONST path uses the fixed "u64" type string.

Point hist_field->type directly to the string literal, matching the
HIST_FIELD_FL_HITCOUNT path. The release path already uses kfree_const(),
so no duplication is needed.

Signed-off-by: Yu Peng <pen...@kylinos.cn>
---
Changes in v2:
- Point hist_field->type directly to "u64" as suggested.

 kernel/trace/trace_events_hist.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index eb2c2bc8bc3d5..b50f2bd5ff771 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1992,9 +1992,7 @@ static struct hist_field *create_hist_field(struct 
hist_trigger_data *hist_data,
        if (flags & HIST_FIELD_FL_CONST) {
                hist_field->fn_num = HIST_FIELD_FN_CONST;
                hist_field->size = sizeof(u64);
-               hist_field->type = kstrdup("u64", GFP_KERNEL);
-               if (!hist_field->type)
-                       goto free;
+               hist_field->type = "u64";
                goto out;
        }
 
-- 
2.43.0