linux-kernel - [PATCH 20/24] ARM: msm: dma: use list_move_tail instead of list_del/list_add

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Date:	Wed, 12 Sep 2012 09:58:56 -0700
From:	David Brown <davidb@...eaurora.org>
To:	David Brown <davidb@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	Russell King <linux@....linux.org.uk>
Cc:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: [PATCH 20/24] ARM: msm: dma: 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().

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
Signed-off-by: David Brown <davidb@...eaurora.org>
---
 arch/arm/mach-msm/dma.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/mach-msm/dma.c b/arch/arm/mach-msm/dma.c
index 02cae5e..354b91d 100644
--- a/arch/arm/mach-msm/dma.c
+++ b/arch/arm/mach-msm/dma.c
@@ -223,8 +223,7 @@ static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)
 			PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);
 			if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {
 				cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);
-				list_del(&cmd->list);
-				list_add_tail(&cmd->list, &active_commands[id]);
+				list_move_tail(&cmd->list, &active_commands[id]);
 				if (cmd->execute_func)
 					cmd->execute_func(cmd);
 				PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

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