linux-kernel - Re: [PATCH v2 4/9] mm: vmalloc: Remove global vmap_area

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Message-ID: <ZO9WxbYUVDfak/5H@pc636>
Date:   Wed, 30 Aug 2023 16:48:37 +0200
From:   Uladzislau Rezki <urezki@...il.com>
To:     kernel test robot <lkp@...el.com>
Cc:     "Uladzislau Rezki (Sony)" <urezki@...il.com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        oe-kbuild-all@...ts.linux.dev, LKML <linux-kernel@...r.kernel.org>,
        Baoquan He <bhe@...hat.com>,
        Lorenzo Stoakes <lstoakes@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Dave Chinner <david@...morbit.com>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Oleksiy Avramchenko <oleksiy.avramchenko@...y.com>
Subject: Re: [PATCH v2 4/9] mm: vmalloc: Remove global vmap_area_root rb-tree

On Tue, Aug 29, 2023 at 10:30:19PM +0800, kernel test robot wrote:
> Hi Uladzislau,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on akpm-mm/mm-everything]
> [also build test WARNING on linus/master v6.5]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Uladzislau-Rezki-Sony/mm-vmalloc-Add-va_alloc-helper/20230829-161248
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/20230829081142.3619-5-urezki%40gmail.com
> patch subject: [PATCH v2 4/9] mm: vmalloc: Remove global vmap_area_root rb-tree
> config: csky-randconfig-r024-20230829 (https://download.01.org/0day-ci/archive/20230829/202308292228.RRrGUYyB-lkp@intel.com/config)
> compiler: csky-linux-gcc (GCC) 13.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230829/202308292228.RRrGUYyB-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202308292228.RRrGUYyB-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>    mm/vmalloc.c: In function 'vmap_init_free_space':
> >> mm/vmalloc.c:4506:45: warning: ordered comparison of pointer with integer zero [-Wextra]
>     4506 |                 if (busy->addr - vmap_start > 0) {
>          |                                             ^
>
Right. I will fix it. We should cast the busy->addr to unsigned long.

--
Uladzislau Rezki