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From:   Linus Walleij <linus.walleij@linaro.org>
Date:   Fri, 8 Mar 2019 09:31:00 +0100
Message-ID: <CACRpkdbvCGRjB1sZWqN3wm660cP8S4-j0ub1j1iYpitDK_eXcQ@mail.gmail.com>
Subject: Re: [PATCH v9 1/9] bitops: Introduce the for_each_set_clump8 macro
To:     William Breathitt Gray <vilhelm.gray@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>
Cc:     "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        linux-arch@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Rasmus Villemoes <linux@rasmusvillemoes.dk>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Arnd Bergmann <arnd@arndb.de>
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On Sun, Mar 3, 2019 at 8:47 AM William Breathitt Gray
<vilhelm.gray@gmail.com> 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@gmail.com>
> Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>

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