linux-kernel - Re: [PATCH v6 3/5] cgroup/cpuset: make callback

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Date:   Mon, 4 Feb 2019 12:55:50 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Juri Lelli <juri.lelli@...hat.com>
Cc:     mingo@...hat.com, rostedt@...dmis.org, tj@...nel.org,
        linux-kernel@...r.kernel.org, luca.abeni@...tannapisa.it,
        claudio@...dence.eu.com, tommaso.cucinotta@...tannapisa.it,
        bristot@...hat.com, mathieu.poirier@...aro.org, lizefan@...wei.com,
        cgroups@...r.kernel.org
Subject: Re: [PATCH v6 3/5] cgroup/cpuset: make callback_lock raw

On Thu, Jan 17, 2019 at 09:47:37AM +0100, Juri Lelli wrote:
> @@ -2366,7 +2366,7 @@ static int cpuset_common_seq_show(struct seq_file *sf, void *v)
>  	cpuset_filetype_t type = seq_cft(sf)->private;
>  	int ret = 0;
>  
> -	spin_lock_irq(&callback_lock);
> +	raw_spin_lock_irq(&callback_lock);
>  
>  	switch (type) {
>  	case FILE_CPULIST:
> @@ -2388,7 +2388,7 @@ static int cpuset_common_seq_show(struct seq_file *sf, void *v)
>  		ret = -EINVAL;
>  	}
>  
> -	spin_unlock_irq(&callback_lock);
> +	raw_spin_unlock_irq(&callback_lock);
>  	return ret;
>  }
>  
could we not convert this to use cpuset_mutex ?