[PATCH 2/2] perf diff: Fix -o/--order option behavior (again)

From: Namhyung Kim
Date: Wed Jan 18 2017 - 00:15:25 EST


The commit 21e6d8428664 changed list_add() to
perf_hpp__register_sort_field(). However this resulted in a behavior
change since the field was added to the tail instead of the head. So
the -o option is mostly ignored due to its order in the list.

This patch fixes it by adding perf_hpp__prepend_sort_field().

Fixes: 21e6d8428664 ("perf diff: Use perf_hpp__register_sort_field interface")
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/builtin-diff.c | 2 +-
tools/perf/ui/hist.c | 6 ++++++
tools/perf/util/hist.h | 7 +++++++
3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 9ff0db4e2d0c..933aeec46f4a 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -1199,7 +1199,7 @@ static int ui_init(void)
BUG_ON(1);
}

- perf_hpp__register_sort_field(fmt);
+ perf_hpp__prepend_sort_field(fmt);
return 0;
}

diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 4ec79b2f9416..18cfcdc90356 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -521,6 +521,12 @@ void perf_hpp_list__register_sort_field(struct perf_hpp_list *list,
list_add_tail(&format->sort_list, &list->sorts);
}

+void perf_hpp_list__prepend_sort_field(struct perf_hpp_list *list,
+ struct perf_hpp_fmt *format)
+{
+ list_add(&format->sort_list, &list->sorts);
+}
+
void perf_hpp__column_unregister(struct perf_hpp_fmt *format)
{
list_del(&format->list);
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index d4b6514eeef5..28c216e3d5b7 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -283,6 +283,8 @@ void perf_hpp_list__column_register(struct perf_hpp_list *list,
struct perf_hpp_fmt *format);
void perf_hpp_list__register_sort_field(struct perf_hpp_list *list,
struct perf_hpp_fmt *format);
+void perf_hpp_list__prepend_sort_field(struct perf_hpp_list *list,
+ struct perf_hpp_fmt *format);

static inline void perf_hpp__column_register(struct perf_hpp_fmt *format)
{
@@ -294,6 +296,11 @@ static inline void perf_hpp__register_sort_field(struct perf_hpp_fmt *format)
perf_hpp_list__register_sort_field(&perf_hpp_list, format);
}

+static inline void perf_hpp__prepend_sort_field(struct perf_hpp_fmt *format)
+{
+ perf_hpp_list__prepend_sort_field(&perf_hpp_list, format);
+}
+
#define perf_hpp_list__for_each_format(_list, format) \
list_for_each_entry(format, &(_list)->fields, list)

--
2.11.0