linux-kernel - Re: [PATCH v3] lib/bitmap: Make count and length parameters unsigned

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Message-ID: <YtBIo8XnDqchGhyk@smile.fi.intel.com>
Date:   Thu, 14 Jul 2022 19:47:31 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     Yury Norov <yury.norov@...il.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] lib/bitmap: Make count and length parameters unsigned

On Thu, Jul 14, 2022 at 06:42:07PM +0200, Paul Menzel wrote:
> Counts and the length are non-negative, so make them unsigned, and adapt the
> while condition in `__bitmap_set()` and `__bitmap_clear()` accordingly.
> 
> For `__bitmap_set()` six less intstructions are used as a result:

You may check this by doing

	make allyesconfig
	make
	cp vmlinux.o old
	# apply your patch
	make
	cp vmlinux.o new
	scripts/bloat-o-meter old new

-- 
With Best Regards,
Andy Shevchenko