linux-kernel - Re: [PATCH 2/8] zram: use idr instead of `zram

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Date:	Tue, 3 Mar 2015 14:01:41 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:	Minchan Kim <minchan@...nel.org>, Nitin Gupta <ngupta@...are.org>,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [PATCH 2/8] zram: use idr instead of `zram_devices' array

On Tue,  3 Mar 2015 21:49:44 +0900 Sergey Senozhatsky <sergey.senozhatsky@...il.com> wrote:

> This patch makes some preparations for dynamic device ADD/REMOVE functionality
> via /dev/zram-control interface.
> 
> Remove `zram_devices' array and switch to id-to-pointer translation (idr).
> idr doesn't bloat zram struct with additional members, f.e. list_head, yet
> still provides ability to match the device_id with the device pointer.
> No user-space visible changes.
> 
> ...
>
> +static DEFINE_IDR(zram_index_idr);

There is no locking protecting this idr?


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