On Mon, 2015-02-23 at 12:29 +0100, Arnd Bergmann wrote:
> The DAX implementation relies on the architecture to provide a working
> copy_user_page() function, as reported by Michael Ellerman's kisskb
> build bot:
>
> fs/dax.c: error: implicit declaration of function 'copy_user_page'
> [-Werror=implicit-function-declaration]: => 266:2
>
> We already have a list of architectures that are known to be incompatible,
> but the list is missing ARC and SH at the moment. Further, blackfin and
> c6x also lack support for this function, but are already excluded because
> they do not support MMU-based kernels.
>
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
> Reported-by: Geert Uytterhoeven <ge...@linux-m68k.org>
> Acked-by: Geert Uytterhoeven <ge...@linux-m68k.org>
> ---
> diff --git a/fs/Kconfig b/fs/Kconfig
> index ec35851e5b71..a24d496787d6 100644
> --- a/fs/Kconfig
> +++ b/fs/Kconfig
> @@ -36,7 +36,7 @@ source "fs/nilfs2/Kconfig"
> config FS_DAX
> bool "Direct Access (DAX) support"
> depends on MMU
> - depends on !(ARM || MIPS || SPARC)
> + depends on !(ARC || ARM || MIPS || SH || SPARC)
Did you mean
SUPERH?
> help
> Direct Access (DAX) can be used on memory-backed block devices.
> If the block device supports DAX and the filesystem supports DAX,
>
Thanks,
Paul Bolle
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