linux-kernel - Re: [KJ] replacing kmalloc with kzalloc in io

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Date:	Mon, 13 Aug 2007 15:18:20 +0200
From:	Mariusz Kozlowski <m.kozlowski@...land.pl>
To:	surya.prabhakar@...ro.com
Cc:	mingo@...hat.com, yaku@...1.kbnes.nec.co.jp,
	kisimoto@...1.kbnes.nec.co.jp, zab@...hat.com,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [KJ] replacing kmalloc with kzalloc in io_apic.c

> Hi,
>    Replacing kmalloc with kzalloc and cleaning up memset in
> arch/i386/kernel/io_apic.c
>
>
> Signed-off-by: Surya Prabhakar <surya.prabhakar@...ro.com>
> ---
>
> diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
> index 4b8a8da..1329615 100644
> --- a/arch/i386/kernel/io_apic.c
> +++ b/arch/i386/kernel/io_apic.c
> @@ -690,14 +690,12 @@ static int __init balanced_irq_init(void)
>  		physical_balance = 1;
>
>  	for_each_online_cpu(i) {
> -		irq_cpu_data[i].irq_delta = kmalloc(sizeof(unsigned long) * NR_IRQS,
> GFP_KERNEL); -		irq_cpu_data[i].last_irq = kmalloc(sizeof(unsigned long) *
> NR_IRQS, GFP_KERNEL); +		irq_cpu_data[i].irq_delta =
> kzalloc(sizeof(unsigned long) * NR_IRQS, GFP_KERNEL);
> +		irq_cpu_data[i].last_irq = kzalloc(sizeof(unsigned long) * NR_IRQS,
> GFP_KERNEL); if (irq_cpu_data[i].irq_delta == NULL ||
> irq_cpu_data[i].last_irq == NULL) { printk(KERN_ERR "balanced_irq_init: out
> of memory");
>  			goto failed;
>  		}
> -		memset(irq_cpu_data[i].irq_delta,0,sizeof(unsigned long) * NR_IRQS);
> -		memset(irq_cpu_data[i].last_irq,0,sizeof(unsigned long) * NR_IRQS);
>  	}
>
>  	printk(KERN_INFO "Starting balanced_irq\n");

How about using kcalloc here?

i.e. 
...
... = kcalloc(NR_IRQS, sizeof(unsigned long), GFP_KERNEL);
...

Regards,

	Mariusz
-
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