linux-kernel - Re: [PATCH 1/3] Add flag to identify block swap devices

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Message-ID: <y2m1b68c6791005070103q8cabf3afx22af4a28c6ecf747@mail.gmail.com>
Date:	Fri, 7 May 2010 17:03:38 +0900
From:	jassi brar <jassisinghbrar@...il.com>
To:	Nitin Gupta <ngupta@...are.org>
Cc:	Greg KH <greg@...ah.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Cyp <cyp561@...il.com>, Minchan Kim <minchan.kim@...il.com>,
	linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 1/3] Add flag to identify block swap devices

On Fri, May 7, 2010 at 4:25 PM, Nitin Gupta <ngupta@...are.org> wrote:
> Added SWP_BLKDEV flag to distinguish block and regular file backed
> swap devices. We could also check if a swap is entire block device,
> rather than a file, by:
> S_ISBLK(swap_info_struct->swap_file->f_mapping->host->i_mode)
> but, I think, simply checking this flag is more convenient.
This might make it convenient for now but is likely to increase complexity and
redundancy. Why not define a macro/inline to figure that out?
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