linux-kernel - Re: [PATCHv2 04/10] zram: factor out device reset from reset

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Message-ID: <20150423022941.GC24928@blaptop>
Date:	Thu, 23 Apr 2015 11:29:41 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [PATCHv2 04/10] zram: factor out device reset from reset_store()

On Thu, Apr 16, 2015 at 08:55:50PM +0900, Sergey Senozhatsky wrote:
> Device reset currently includes two steps:
> a) holding ->bd_mutex we ensure that there are no device users
> (bdev->bd_openers)
> 
> b) and "internal" part (executed under bdev->bd_mutex and partially
> under zram->init_lock) that resets the device - frees allocated
> memory and returns the device back to its initial state.
> 
> Up until now it worked just fine. But there will be yet another device
> reset user soon -- on-demand device removal. We currently can reuse (b),
> but step (a) is done in sysfs ATTR reset_store() handler, which makes it
> hard to use it in on-demand device reset path.
> 
> Rename step (b) from zram_reset_device() to zram_reset_device_internal()

Usually, we use double underbar to show interal function so I prefer
__zram_reset_device to xxx_internal.

> and factor out step (a) to zram_reset_device().
> 
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Acked-by: Minchan Kim <minchan@...nel.org>

-- 
Kind regards,
Minchan Kim
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