linux-kernel - [PATCH] ALSA: use list_move_tail instead of list_del/list_add

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Date:	Wed, 5 Sep 2012 14:33:21 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	clemens@...isch.de, perex@...ex.cz, tiwai@...e.de
Cc:	yongjun_wei@...ndmicro.com.cn, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ALSA: use list_move_tail instead of list_del/list_add_tail

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Using list_move_tail() instead of list_del() + list_add_tail().

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 sound/drivers/opl4/opl4_synth.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/sound/drivers/opl4/opl4_synth.c b/sound/drivers/opl4/opl4_synth.c
index 49b9e24..4b91adc 100644
--- a/sound/drivers/opl4/opl4_synth.c
+++ b/sound/drivers/opl4/opl4_synth.c
@@ -504,8 +504,7 @@ void snd_opl4_note_on(void *private_data, int note, int vel, struct snd_midi_cha
 	spin_lock_irqsave(&opl4->reg_lock, flags);
 	for (i = 0; i < voices; i++) {
 		voice[i] = snd_opl4_get_voice(opl4);
-		list_del(&voice[i]->list);
-		list_add_tail(&voice[i]->list, &opl4->on_voices);
+		list_move_tail(&voice[i]->list, &opl4->on_voices);
 		voice[i]->chan = chan;
 		voice[i]->note = note;
 		voice[i]->velocity = vel & 0x7f;
@@ -555,8 +554,7 @@ void snd_opl4_note_on(void *private_data, int note, int vel, struct snd_midi_cha
 
 static void snd_opl4_voice_off(struct snd_opl4 *opl4, struct opl4_voice *voice)
 {
-	list_del(&voice->list);
-	list_add_tail(&voice->list, &opl4->off_voices);
+	list_move_tail(&voice->list, &opl4->off_voices);
 
 	voice->reg_misc &= ~OPL4_KEY_ON_BIT;
 	snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);
@@ -571,8 +569,7 @@ void snd_opl4_note_off(void *private_data, int note, int vel, struct snd_midi_ch
 
 static void snd_opl4_terminate_voice(struct snd_opl4 *opl4, struct opl4_voice *voice)
 {
-	list_del(&voice->list);
-	list_add_tail(&voice->list, &opl4->off_voices);
+	list_move_tail(&voice->list, &opl4->off_voices);
 
 	voice->reg_misc = (voice->reg_misc & ~OPL4_KEY_ON_BIT) | OPL4_DAMP_BIT;
 	snd_opl4_write(opl4, OPL4_REG_MISC + voice->number, voice->reg_misc);

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