Subject: Re: [patch] powerpc: sysfs fix compiler warning

From: Michael Buesch <[email-masked]>
Date: Fri, 29 Jun 2007 16:57:20 +0200

On Friday 29 June 2007 16:50:10 Christian Krafft wrote:
> From: Christian Krafft <[email-masked]>
> 
> This patch fixes the following compiler warning:
> arch/powerpc/kernel/sysfs.c:385: warning: ignoring return value of
> `sysfs_create_group',
> 
> Signed-off-by: Christian Krafft <[email-masked]>
> 
> --- linux-2.6.orig/arch/powerpc/kernel/sysfs.c
> +++ linux-2.6/arch/powerpc/kernel/sysfs.c
> @@ -380,16 +380,25 @@ int cpu_add_sysdev_attr_group(struct att
>  {
>  	int cpu;
>  	struct sys_device *sysdev;
> +	int error = 0;
>  
>  	mutex_lock(&cpu_mutex);
>  
>  	for_each_possible_cpu(cpu) {
>  		sysdev = get_cpu_sysdev(cpu);
> -		sysfs_create_group(&sysdev->kobj, attrs);
> +		error = sysfs_create_group(&sysdev->kobj, attrs);
> +
> +		if (error) {
> +			for_each_possible_cpu(cpu) {
> +				sysdev = get_cpu_sysdev(cpu);
> +				sysfs_remove_group(&sysdev->kobj, attrs);

Is sysfs_remove_group() safe to call on kobjs for which
we did not call sysfs_create_group()?

> +			}
> +			break;
> +		}
>  	}
>  
>  	mutex_unlock(&cpu_mutex);
> -	return 0;
> +	return error;
>  }
>  EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
>  
> 
> 

-- 
Greetings Michael.