linux-kernel - [PATCH] arm:pm: Use kmemdup to replace duplicating its implementation

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Date:   Fri, 10 Aug 2018 10:40:51 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <linux@...linux.org.uk>, <vz@...ia.com>, <slemieux.tyco@...il.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] arm:pm: Use kmemdup to replace duplicating its implementation

kmemdup is better than kmalloc() + memcpy(), and we do not like
open code. So just use kmemdup instead.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 arch/arm/mach-lpc32xx/pm.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-lpc32xx/pm.c b/arch/arm/mach-lpc32xx/pm.c
index 6247157..6eefff8 100644
--- a/arch/arm/mach-lpc32xx/pm.c
+++ b/arch/arm/mach-lpc32xx/pm.c
@@ -86,7 +86,8 @@ static int lpc32xx_pm_enter(suspend_state_t state)
 	void *iram_swap_area;
 
 	/* Allocate some space for temporary IRAM storage */
-	iram_swap_area = kmalloc(lpc32xx_sys_suspend_sz, GFP_KERNEL);
+	iram_swap_area = kmemdup((void *)TEMP_IRAM_AREA,
+				lpc32xx_sys_suspend_sz, GFP_KERNEL);
 	if (!iram_swap_area) {
 		printk(KERN_ERR
 		       "PM Suspend: cannot allocate memory to save portion "
@@ -94,10 +95,6 @@ static int lpc32xx_pm_enter(suspend_state_t state)
 		return -ENOMEM;
 	}
 
-	/* Backup a small area of IRAM used for the suspend code */
-	memcpy(iram_swap_area, (void *) TEMP_IRAM_AREA,
-		lpc32xx_sys_suspend_sz);
-
 	/*
 	 * Copy code to suspend system into IRAM. The suspend code
 	 * needs to run from IRAM as DRAM may no longer be available
-- 
1.7.12.4