remove set_fs for riscv v2

[Christoph Hellwig]

Can we get this series picked up either in Al's base.set_fs tree, or
a branch in the riscv tree?

On Mon, Sep 07, 2020 at 07:58:17AM +0200, Christoph Hellwig wrote:
> Hi all,
> 
> this series converts riscv to the new set_fs less world and is on top of this
> branch:
> 
>     https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/log/?h=base.set_fs
> 
> The first four patches are general improvements and enablement for all nommu
> ports, and might make sense to merge through the above base branch.
> 
> Changes since v1:
>  - implement __get_user_fn and __put_user_fn for the UACCESS_MEMCPY case
>    and remove the small constant size optimizations in raw_copy_from_user
>    and raw_copy_to_user
>  - reshuffle the patch order a little
> 
> Diffstat
>  arch/riscv/Kconfig                   |    2 
>  arch/riscv/include/asm/thread_info.h |    6 -
>  arch/riscv/include/asm/uaccess.h     |  177 +++++++++++++++++------------------
>  arch/riscv/kernel/process.c          |    1 
>  arch/riscv/lib/Makefile              |    2 
>  include/asm-generic/uaccess.h        |  109 +++++++++++++--------
>  include/linux/uaccess.h              |    4 
>  7 files changed, 166 insertions(+), 135 deletions(-)
> 
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