linux-kernel - Re: [RFC 07/15] PM / Hibernate: add sws_modules

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Message-ID: <20100324203634.GH5798@elf.ucw.cz>
Date:	Wed, 24 Mar 2010 21:36:34 +0100
From:	Pavel Machek <pavel@....cz>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	jirislaby@...il.com, linux-pm@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org,
	Nigel Cunningham <ncunningham@...a.org.au>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [RFC 07/15] PM / Hibernate: add sws_modules_ops

On Tue 2010-03-23 17:17:35, Jiri Slaby wrote:
> For now they will only hold swap operations. In next patches, user
> support will be converted to ops as well to have a single layer and
> can push pages instead of pulling them.

> +struct sws_module_ops {
> +	unsigned long (*storage_available)(void);
> +
> +	int (*get_reader)(unsigned int *flags_p);
> +	int (*put_reader)(void);
> +	int (*get_writer)(void);
> +	int (*put_writer)(unsigned int flags, int error);
> +	int (*read_page)(void *addr, struct bio **bio_chain);
> +	int (*write_page)(void *addr, struct bio **bio_chain);
> +};

sws_ prefix is strange.

Plus, could we get some docs what it does? Stuff like "get_writer" is
not entirely self-documenting.

									Pavel

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