[RFC,0/2] Import and use non-atomic bit-ops

The following bitops are implemented pretty similarly for many
arches and now when we faced a need in them on ARC I guess there's
no point in copy-pasting them yet another time but instead it might
be better re-use generic version from the Linux kernel.

Since we had non of those bitops for ARC inclusion of imported header
works perfectly fine. As for other arches I do see they use a bit different
implementation but those might be just older versions etc.

Sobefore breaking stuff for other arches I'd like to get some feedback
from maintainers. Or we may just import proposed header and switch to
its usage arch-by-arch whenever people feel kile cleaning-up their bitops.

Alexey Brodkin (2):
  include: Import non-atomic.h from Linux
  ARC: Add support of bitops via generic implementation

 arch/arc/include/asm/bitops.h           |   1 +
 include/asm-generic/bitops/non-atomic.h | 109 ++++++++++++++++++++++++++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 include/asm-generic/bitops/non-atomic.h

On Mon, Jan 20, 2020 at 03:43:27PM +0300, Alexey Brodkin wrote:

> The following bitops are implemented pretty similarly for many
> arches and now when we faced a need in them on ARC I guess there's
> no point in copy-pasting them yet another time but instead it might
> be better re-use generic version from the Linux kernel.
> 
> Since we had non of those bitops for ARC inclusion of imported header
> works perfectly fine. As for other arches I do see they use a bit different
> implementation but those might be just older versions etc.
> 
> Sobefore breaking stuff for other arches I'd like to get some feedback
> from maintainers. Or we may just import proposed header and switch to
> its usage arch-by-arch whenever people feel kile cleaning-up their bitops.
> 
> Alexey Brodkin (2):
>   include: Import non-atomic.h from Linux
>   ARC: Add support of bitops via generic implementation
> 
>  arch/arc/include/asm/bitops.h           |   1 +
>  include/asm-generic/bitops/non-atomic.h | 109 ++++++++++++++++++++++++++++++++
>  2 files changed, 110 insertions(+)
>  create mode 100644 include/asm-generic/bitops/non-atomic.h

I would like to see this as a series to re-sync
include/asm-generic/bitops/ with a more recent Linux Kernel release
(it's from v4.2.3 per git log) and then add non-atomic.h and update
nios2 to use it instead of its own copy.  Thanks!