From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ross Zwisler <ross.zwisler@linux.intel.com>
Date: Thu, 08 Oct 2015 23:07:34 +0000
Subject: Re: [PATCH] sh: add copy_user_page() alias for __copy_user()
Message-Id: <20151008230734.GB19399@linux.intel.com>
List-Id: <linux-sh.vger.kernel.org>
References: <1442958411-4271-1-git-send-email-ross.zwisler@linux.intel.com>
In-Reply-To: <1442958411-4271-1-git-send-email-ross.zwisler@linux.intel.com>
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To: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven <geert@linux-m68k.org>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Matthew Wilcox <willy@linux.intel.com>, linux-fsdevel@vger.kernel.org

On Tue, Sep 22, 2015 at 03:46:51PM -0600, Ross Zwisler wrote:
> copy_user_page() is needed by DAX.  Without this we get a compile error
> for DAX on SH:
> 
> fs/dax.c:280:2: error: implicit declaration of function ‘copy_user_page’
> [-Werror=implicit-function-declaration]
>   copy_user_page(vto, (void __force *)vfrom, vaddr, to);
>     ^
> 
> This was done with a random config that happened to include DAX support.
> 
> This patch has only been compile tested.
> 
> Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
> ---
> Apologies for the resend, I wanted to add some more recipients.
> ---
>  arch/sh/include/asm/page.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
> index fe20d14..ceb5201 100644
> --- a/arch/sh/include/asm/page.h
> +++ b/arch/sh/include/asm/page.h
> @@ -59,6 +59,7 @@ pages_do_alias(unsigned long addr1, unsigned long addr2)
>  
>  #define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
>  extern void copy_page(void *to, void *from);
> +#define copy_user_page(to, from, vaddr, pg)  __copy_user(to, from, PAGE_SIZE)
>  
>  struct page;
>  struct vm_area_struct;

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