linux-kernel - Re: [PATCH v2 1/4] dax: kill uml support

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Date:   Fri, 23 Dec 2016 14:45:39 +0100
From:   Jan Kara <jack@...e.cz>
To:     Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org,
        Dan Williams <dan.j.williams@...el.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>, Christoph Hellwig <hch@....de>,
        Dave Chinner <david@...morbit.com>,
        Dave Hansen <dave.hansen@...el.com>, Jan Kara <jack@...e.cz>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        linux-arch@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-nvdimm@...ts.01.org
Subject: Re: [PATCH v2 1/4] dax: kill uml support

On Thu 22-12-16 14:18:53, Ross Zwisler wrote:
> From: Dan Williams <dan.j.williams@...el.com>
> 
> The lack of common transparent-huge-page helpers for UML is becoming
> increasingly painful for fs/dax.c now that it is growing more pmd
> functionality. Add UML to the list of unsupported architectures.
> 
> Cc: Jan Kara <jack@...e.cz>
> Cc: Christoph Hellwig <hch@....de>
> Cc: Dave Chinner <david@...morbit.com>
> Cc: Dave Hansen <dave.hansen@...el.com>
> Cc: Matthew Wilcox <mawilcox@...rosoft.com>
> Cc: Alexander Viro <viro@...iv.linux.org.uk>
> Cc: Ross Zwisler <ross.zwisler@...ux.intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
> [rez: squashed #ifdef removal into another patch in the series ]
> Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>

Fine by me. You can add:

Acked-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/Kconfig b/fs/Kconfig
> index c2a377c..661931f 100644
> --- a/fs/Kconfig
> +++ b/fs/Kconfig
> @@ -37,7 +37,7 @@ source "fs/f2fs/Kconfig"
>  config FS_DAX
>  	bool "Direct Access (DAX) support"
>  	depends on MMU
> -	depends on !(ARM || MIPS || SPARC)
> +	depends on !(ARM || MIPS || SPARC || UML)
>  	help
>  	  Direct Access (DAX) can be used on memory-backed block devices.
>  	  If the block device supports DAX and the filesystem supports DAX,
> -- 
> 2.7.4
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR