linux-kernel - Re: [PATCH v3 3/8] bitmap: fix opencoded bitmap_allocate

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Date:   Mon, 28 Aug 2023 18:36:18 -0700
From:   Yury Norov <yury.norov@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: Re: [PATCH v3 3/8] bitmap: fix opencoded bitmap_allocate_region()

On Thu, Aug 17, 2023 at 12:45:23PM +0300, Andy Shevchenko wrote:
> On Tue, Aug 15, 2023 at 04:36:23PM -0700, Yury Norov wrote:
> > bitmap_find_region() opencodes bitmap_allocate_region(). Fix it.
> 
> ...
> 
> >  	for (pos = 0; (end = pos + BIT(order)) <= bits; pos = end) {
> > -		if (!__reg_op(bitmap, pos, order, REG_OP_ISFREE))
> > -			continue;
> > -		__reg_op(bitmap, pos, order, REG_OP_ALLOC);
> > -		return pos;
> > +		if (!bitmap_allocate_region(bitmap, pos, order))
> > +			return pos;
> 
> You can also leave more code untouched, by replacing only first conditional
> with
> 
> 		if (bitmap_allocate_region(bitmap, pos, order))
> 			continue;
> 		return pos;

This looks weird, and doesn't help preserving history because the
following patch moves everything from c-file to the header. I'd prefer
to keep this as is.

> 
> >  	}
> >  	return -ENOMEM;
> 
> -- 
> With Best Regards,
> Andy Shevchenko
>