linux-kernel - [PATCH 1/8] perf thread-stack: Simplify some code in thread_stack_

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Date:   Fri, 21 Dec 2018 14:06:13 +0200
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/8] perf thread-stack: Simplify some code in thread_stack__process()

In preparation for fixing thread stack processing for the idle task,
simplify some code in thread_stack__process().

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 tools/perf/util/thread-stack.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/tools/perf/util/thread-stack.c b/tools/perf/util/thread-stack.c
index 61a4286a74dc..115dc4b27a1b 100644
--- a/tools/perf/util/thread-stack.c
+++ b/tools/perf/util/thread-stack.c
@@ -593,17 +593,13 @@ int thread_stack__process(struct thread *thread, struct comm *comm,
 	struct thread_stack *ts = thread->ts;
 	int err = 0;
 
-	if (ts) {
-		if (!ts->crp) {
-			/* Supersede thread_stack__event() */
-			thread_stack__free(thread);
-			thread->ts = thread_stack__new(thread, crp);
-			if (!thread->ts)
-				return -ENOMEM;
-			ts = thread->ts;
-			ts->comm = comm;
-		}
-	} else {
+	if (ts && !ts->crp) {
+		/* Supersede thread_stack__event() */
+		thread_stack__free(thread);
+		ts = NULL;
+	}
+
+	if (!ts) {
 		thread->ts = thread_stack__new(thread, crp);
 		if (!thread->ts)
 			return -ENOMEM;
-- 
2.17.1