[PATCH] perf thread: cleanup with list_first_entry_or_null()

[Masahiro Yamada]

The combo of list_empty() check and return list_first_entry()
can be replaced with list_first_entry_or_null().

Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---

 tools/perf/util/thread.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 8b10a55..ea951df 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -107,10 +107,7 @@ void thread__put(struct thread *thread)
 
 struct comm *thread__comm(const struct thread *thread)
 {
-       if (list_empty(&thread->comm_list))
-               return NULL;
-
-       return list_first_entry(&thread->comm_list, struct comm, list);
+       return list_first_entry_or_null(&thread->comm_list, struct comm, list);
 }
 
 struct comm *thread__exec_comm(const struct thread *thread)
-- 
1.9.1