linux-kernel - Re: [PATCH 2.6.19-rc6] sparc: replace kmalloc+memset with kzalloc

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Message-ID: <45672D00.8060903@s5r6.in-berlin.de>
Date:	Fri, 24 Nov 2006 18:33:52 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Yan Burman <burman.yan@...il.com>
CC:	linux-kernel@...r.kernel.org, trivial@...nel.org,
	wli@...omorphy.com, sparclinux@...r.kernel.org
Subject: Re: [PATCH 2.6.19-rc6] sparc: replace kmalloc+memset with kzalloc

Yan Burman wrote:
...
> --- linux-2.6.19-rc5_orig/arch/sparc/kernel/sun4d_irq.c	2006-11-09 12:16:21.000000000 +0200
> +++ linux-2.6.19-rc5_kzalloc/arch/sparc/kernel/sun4d_irq.c	2006-11-11 22:44:04.000000000 +0200
> @@ -545,8 +545,7 @@ void __init sun4d_init_sbi_irq(void)
>  	nsbi = 0;
>  	for_each_sbus(sbus)
>  		nsbi++;
> -	sbus_actions = (struct sbus_action *)kmalloc (nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
> -	memset (sbus_actions, 0, (nsbi * 8 * 4 * sizeof(struct sbus_action)));
> +	sbus_actions = kzalloc (nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
>  	for_each_sbus(sbus) {
>  #ifdef CONFIG_SMP	
>  		extern unsigned char boot_cpu_id;

I'm not sure about this ^ hunk, but...

> diff -rubp linux-2.6.19-rc5_orig/arch/sparc/mm/io-unit.c linux-2.6.19-rc5_kzalloc/arch/sparc/mm/io-unit.c
> --- linux-2.6.19-rc5_orig/arch/sparc/mm/io-unit.c	2006-11-09 12:16:21.000000000 +0200
> +++ linux-2.6.19-rc5_kzalloc/arch/sparc/mm/io-unit.c	2006-11-11 22:44:04.000000000 +0200
> @@ -41,9 +41,8 @@ iounit_init(int sbi_node, int io_node, s
>  	struct linux_prom_registers iommu_promregs[PROMREG_MAX];
>  	struct resource r;
>  
> -	iounit = kmalloc(sizeof(struct iounit_struct), GFP_ATOMIC);
> +	iounit = kzalloc(sizeof(struct iounit_struct), GFP_ATOMIC);
>  
> -	memset(iounit, 0, sizeof(*iounit));
>  	iounit->limit[0] = IOUNIT_BMAP1_START;
>  	iounit->limit[1] = IOUNIT_BMAP2_START;
>  	iounit->limit[2] = IOUNIT_BMAPM_START;

...in this ^, the old code and your update don't check for NULL return.
-- 
Stefan Richter
-=====-=-==- =-== ==---
http://arcgraph.de/sr/
-
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