linux-kernel - Re: [PATCH 13/13] libnvdimm, namespace: Publish page structure init state / control

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Message-ID: <20180705082931.echvdqipgvwhghf2@linux-x5ow.site>
Date:   Thu, 5 Jul 2018 10:29:31 +0200
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     akpm@...ux-foundation.org,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Jeff Moyer <jmoyer@...hat.com>, hch@....de,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/13] libnvdimm, namespace: Publish page structure init
 state / control

On Wed, Jul 04, 2018 at 11:50:13PM -0700, Dan Williams wrote:
> +static ssize_t memmap_state_store(struct device *dev,
> +		struct device_attribute *attr, const char *buf, size_t len)
> +{
> +	int i;
> +	struct nd_pfn *nd_pfn = to_nd_pfn_safe(dev);
> +	struct memmap_async_state *async = &nd_pfn->async;
> +
> +	if (strcmp(buf, "sync") == 0)
> +		/* pass */;
> +	else if (strcmp(buf, "sync\n") == 0)
> +		/* pass */;
> +	else
> +		return -EINVAL;

Hmm what about:

  	if (strncmp(buf, "sync", 4))
	   return -EINVAL;

This collapses 6 lines into 4.


-- 
Johannes Thumshirn                                          Storage
jthumshirn@...e.de                                +49 911 74053 689
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