linux-kernel - Re: [PATCH 2/2] lib: add test for bitmap

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Message-Id: <20170809133309.746aafee5e22c9345debd671@linux-foundation.org>
Date:   Wed, 9 Aug 2017 13:33:09 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     kbuild test robot <lkp@...el.com>
Cc:     Yury Norov <ynorov@...iumnetworks.com>, kbuild-all@...org,
        Noam Camus <noamca@...lanox.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] lib: add test for bitmap_parselist()

On Wed, 9 Aug 2017 11:28:56 +0800 kbuild test robot <lkp@...el.com> wrote:

> [auto build test WARNING on linus/master]
> [also build test WARNING on v4.13-rc4 next-20170808]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Yury-Norov/lib-make-bitmap_parselist-thread-safe-and-much-faster/20170809-105307
> config: i386-randconfig-x000-201732 (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All warnings (new ones prefixed by >>):
> 
> >> lib/test_bitmap.c:180:17: warning: large integer implicitly truncated to unsigned type [-Woverflow]
>         0xfffffffe, 0x3333333311111111, 0xffffffff77777777};
>                     ^~~~~~~~~~~~~~~~~~

I assume that a simple convertion to unsigned long long will fix that,
but I'll await Yuri's input (and testing).

btw, exp[] and exp2[] could be __initconst?