Re: [PATCH v9 1/9] bitops: Introduce the for_each_set_clump8 macro

[Linus Walleij]

On Sun, Mar 3, 2019 at 8:47 AM William Breathitt Gray
<vilhelm.gray@xxxxxxxxx> wrote:

> This macro iterates for each 8-bit group of bits (clump) with set bits,
> within a bitmap memory region. For each iteration, "start" is set to the
> bit offset of the found clump, while the respective clump value is
> stored to the location pointed by "clump". Additionally, the
> bitmap_get_value8 and bitmap_set_value8 functions are introduced to
> respectively get and set an 8-bit value in a bitmap memory region.
>
> Suggested-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> Suggested-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>

Andrew: would you be OK with this being merged in v5.1?

If we need to move the code to drivers/gpio that's OK (though
I think it's generally useful) but I need to know to proceed with
the William's nice optimization of these drivers.

Yours,
Linus Walleij