linux-kernel - Re: [PATCH v18 01/14] bitops: Introduce the for_each_set

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Date:   Thu, 10 Oct 2019 16:18:42 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     William Breathitt Gray <vilhelm.gray@...il.com>,
        linus.walleij@...aro.org, bgolaszewski@...libre.com,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux@...musvillemoes.dk,
        yamada.masahiro@...ionext.com,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        geert@...ux-m68k.org, preid@...ctromag.com.au, lukas@...ner.de,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v18 01/14] bitops: Introduce the for_each_set_clump8 macro

On Wed, Oct 09, 2019 at 02:18:55PM -0700, Andrew Morton wrote:
> On Wed,  9 Oct 2019 13:14:37 -0400 William Breathitt Gray <vilhelm.gray@...il.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.
> > 
> > ...
> >  
> > +#define for_each_set_clump8(start, clump, bits, size) \
> > +	for ((start) = find_first_clump8(&(clump), (bits), (size)); \
> > +	     (start) < (size); \
> > +	     (start) = find_next_clump8(&(clump), (bits), (size), (start) + 8))
> > +
> 
> It wouldn't hurt to give this some documentation.  In kerneldoc form, I
> guess.

Good idea!

William, I have just tested your series with a complex hardware setup,
everything works to me.

I think I may give

Tested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

for this patch as well.

-- 
With Best Regards,
Andy Shevchenko