linux-kernel - Re: [PATCH v2 2/3] remove dependency with x86

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Message-ID: <4FB3DFDB.80605@linux.vnet.ibm.com>
Date:	Wed, 16 May 2012 12:11:55 -0500
From:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
To:	Minchan Kim <minchan@...nel.org>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nitin Gupta <ngupta@...are.org>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 2/3] remove dependency with x86

On 05/15/2012 09:05 PM, Minchan Kim wrote:

> Exactly saying, [zram|zcache] should has a dependency with
> zsmalloc, not x86. So replace x86 dependeny with ZSMALLOC.
> 
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Signed-off-by: Minchan Kim <minchan@...nel.org>
> ---
>  drivers/staging/zcache/Kconfig |    3 +--
>  drivers/staging/zram/Kconfig   |    3 +--
>  2 files changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/zcache/Kconfig b/drivers/staging/zcache/Kconfig
> index 7048e01..ceb7f28 100644
> --- a/drivers/staging/zcache/Kconfig
> +++ b/drivers/staging/zcache/Kconfig
> @@ -2,8 +2,7 @@ config ZCACHE
>  	bool "Dynamic compression of swap pages and clean pagecache pages"
>  	# X86 dependency is because zsmalloc uses non-portable pte/tlb
>  	# functions
> -	depends on (CLEANCACHE || FRONTSWAP) && CRYPTO=y && X86
> -	select ZSMALLOC
> +	depends on (CLEANCACHE || FRONTSWAP) && CRYPTO=y && ZSMALLOC


Sorry Minchan, I should have said this the first time around.  I ran
into this issue before with CRYTPO vs CRYPTO=y.  ZCACHE is a bool where
ZSMALLOC is a tristate.  It is not sufficient for ZSMALLOC to be set; it
_must_ be builtin, otherwise you get linker errors.

The dependency should be ZSMALLOC=y.

Thanks,
Seth

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