linux-kernel - Re: [PATCH 2/2] zram: add writeback batch size device attr

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Message-ID: <otnmm7behvnsbcqmknx45pgonsdvk4fma4o72qui3bjidwfc35@aurhln6nfyyz>
Date: Thu, 13 Nov 2025 15:11:19 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Sergey Senozhatsky <senozhatsky@...omium.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, 
	Minchan Kim <minchan@...nel.org>, Yuwen Chen <ywen.chen@...mail.com>, 
	Richard Chang <richardycc@...gle.com>, Brian Geffon <bgeffon@...gle.com>, 
	Fengyu Lian <licayy@...look.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	linux-block@...r.kernel.org
Subject: Re: [PATCH 2/2] zram: add writeback batch size device attr

On (25/11/13 14:59), Sergey Senozhatsky wrote:
> +static ssize_t writeback_batch_size_show(struct device *dev,
> +					 struct device_attribute *attr,
> +					 char *buf)
> +{
> +	u32 val;
> +	struct zram *zram = dev_to_zram(dev);
> +
> +	down_read(&zram->init_lock);
> +	spin_lock(&zram->wb_limit_lock);
> +	val = zram->wb_batch_size;
> +	spin_unlock(&zram->wb_limit_lock);
> +	up_read(&zram->init_lock);
> +
> +	return sysfs_emit(buf, "%u\n", val);
> +}

The ->wb_limit_lock is not needed here, a leftover from an earlier
version.  Will fix in the next iteration.