linux-kernel - [PATCH 1/3] tracing: Get rid of unneeded key calculation in ftrace_hash

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Message-Id: <1365553093-10180-1-git-send-email-namhyung@kernel.org>
Date:	Wed, 10 Apr 2013 09:18:11 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: [PATCH 1/3] tracing: Get rid of unneeded key calculation in ftrace_hash_move()

From: Namhyung Kim <namhyung.kim@....com>

It's not used anywhere in the function.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 kernel/trace/ftrace.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 78f4398cb608..03953fbd1b2a 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1312,7 +1312,6 @@ ftrace_hash_move(struct ftrace_ops *ops, int enable,
 	struct hlist_head *hhd;
 	struct ftrace_hash *old_hash;
 	struct ftrace_hash *new_hash;
-	unsigned long key;
 	int size = src->count;
 	int bits = 0;
 	int ret;
@@ -1355,10 +1354,6 @@ ftrace_hash_move(struct ftrace_ops *ops, int enable,
 	for (i = 0; i < size; i++) {
 		hhd = &src->buckets[i];
 		hlist_for_each_entry_safe(entry, tp, tn, hhd, hlist) {
-			if (bits > 0)
-				key = hash_long(entry->ip, bits);
-			else
-				key = 0;
 			remove_hash_entry(src, entry);
 			__add_hash_entry(new_hash, entry);
 		}
-- 
1.7.11.7

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