linux-kernel - Re: [PATCH v5 4/4] dax: add a sysfs knob to control memmap_on

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Date:   Thu, 14 Dec 2023 09:31:07 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Vishal Verma <vishal.l.verma@...el.com>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Oscar Salvador <osalvador@...e.de>,
        linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev,
        linux-cxl@...r.kernel.org, David Hildenbrand <david@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Huang Ying <ying.huang@...el.com>, linux-mm@...ck.org,
        Li Zhijian <lizhijian@...itsu.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v5 4/4] dax: add a sysfs knob to control memmap_on_memory
 behavior

On Thu, Dec 14, 2023 at 12:37:57AM -0700, Vishal Verma wrote:
> +static ssize_t memmap_on_memory_show(struct device *dev,
> +				     struct device_attribute *attr, char *buf)
> +{
> +	struct dev_dax *dev_dax = to_dev_dax(dev);
> +
> +	return sprintf(buf, "%d\n", dev_dax->memmap_on_memory);

checkpatch should have noticed that this should be sysfs_emit(), right?
If not, please make the change anyway.

> diff --git a/Documentation/ABI/testing/sysfs-bus-dax b/Documentation/ABI/testing/sysfs-bus-dax
> index 6359f7bc9bf4..40d9965733b2 100644
> --- a/Documentation/ABI/testing/sysfs-bus-dax
> +++ b/Documentation/ABI/testing/sysfs-bus-dax
> @@ -134,3 +134,20 @@ KernelVersion:	v5.1
>  Contact:	nvdimm@...ts.linux.dev
>  Description:
>  		(RO) The id attribute indicates the region id of a dax region.
> +
> +What:		/sys/bus/dax/devices/daxX.Y/memmap_on_memory
> +Date:		October, 2023

It's not October anymore :)

thanks,

greg k-h