linux-kernel - Re: [PATCH RESEND 2/2] mm/zswap: refoctor the get/put routines

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Date:	Fri, 25 Oct 2013 19:20:32 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Weijie Yang <weijie.yang@...sung.com>
Cc:	akpm@...ux-foundation.org, sjennings@...iantweb.net,
	bob.liu@...cle.com, weijie.yang.kh@...il.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH RESEND 2/2] mm/zswap: refoctor the get/put routines

On Thu, Oct 24, 2013 at 05:53:32PM +0800, Weijie Yang wrote:
> The refcount routine was not fit the kernel get/put semantic exactly,
> There were too many judgement statements on refcount and it could be minus.
> 
> This patch does the following:
> 
> - move refcount judgement to zswap_entry_put() to hide resource free function.
> 
> - add a new function zswap_entry_find_get(), so that callers can use easily
> in the following pattern:
> 
>    zswap_entry_find_get
>    .../* do something */
>    zswap_entry_put
> 
> - to eliminate compile error, move some functions declaration
> 
> This patch is based on Minchan Kim <minchan@...nel.org> 's idea and suggestion.
> 
> Signed-off-by: Weijie Yang <weijie.yang@...sung.com>
> Cc: Seth Jennings <sjennings@...iantweb.net>
> Cc: Minchan Kim <minchan@...nel.org>
> Cc: Bob Liu <bob.liu@...cle.com>


I remember Bob had a idea to remove a look up and I think it's doable.
Anyway, I don't mind you send it with fix or not.

Thanks for handling this, Weijie!

Acked-by: Minchan Kim <minchan@...nel.org>

-- 
Kind regards,
Minchan Kim
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