linux-kernel - Re: [PATCHv4 2/6] zram: add writeback batch size device attr

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Message-ID: <birguuoazoxjeijvnnxjlpv2avd5cgptf4cylmdaj2a2sdhhem@svegzn74fjr7>
Date: Fri, 21 Nov 2025 10:55:10 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Sergey Senozhatsky <senozhatsky@...omium.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: [PATCHv4 2/6] zram: add writeback batch size device attr

On (25/11/20 17:17), Andrew Morton wrote:
> > +static ssize_t writeback_batch_size_store(struct device *dev,
> > +					  struct device_attribute *attr,
> > +					  const char *buf, size_t len)
> > +{
> > +	struct zram *zram = dev_to_zram(dev);
> > +	u32 val;
> > +	ssize_t ret = -EINVAL;
> > +
> > +	if (kstrtouint(buf, 10, &val))
> > +		return ret;
> > +
> > +	if (!val)
> > +		val = 1;
> > +
> > +	down_read(&zram->init_lock);
> 
> down_write()?

Indeed.  Thanks!