linux-kernel - Re: [PATCH 1/7] mm/zswap: make sure each swapfile always have zswap rb-tree

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Message-ID: <35bff89e-a984-42e3-a6e7-1933b12b6451@bytedance.com>
Date:   Fri, 8 Dec 2023 23:45:02 +0800
From:   Chengming Zhou <zhouchengming@...edance.com>
To:     kernel test robot <lkp@...el.com>,
        Vitaly Wool <vitaly.wool@...sulko.com>,
        Nhat Pham <nphamcs@...il.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Seth Jennings <sjenning@...hat.com>,
        Dan Streetman <ddstreet@...e.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Yosry Ahmed <yosryahmed@...gle.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        Linux Memory Management List <linux-mm@...ck.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/7] mm/zswap: make sure each swapfile always have zswap
 rb-tree

On 2023/12/8 23:17, kernel test robot wrote:
> Hi Chengming,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on 0f5f12ac05f36f117e793656c3f560625e927f1b]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Chengming-Zhou/mm-zswap-make-sure-each-swapfile-always-have-zswap-rb-tree/20231206-174717
> base:   0f5f12ac05f36f117e793656c3f560625e927f1b
> patch link:    https://lore.kernel.org/r/20231206-zswap-lock-optimize-v1-1-e25b059f9c3a%40bytedance.com
> patch subject: [PATCH 1/7] mm/zswap: make sure each swapfile always have zswap rb-tree
> config: i386-buildonly-randconfig-002-20231208 (https://download.01.org/0day-ci/archive/20231208/202312082309.xvC0Rdd9-lkp@intel.com/config)
> compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231208/202312082309.xvC0Rdd9-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/202312082309.xvC0Rdd9-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>    In file included from arch/x86/kernel/asm-offsets.c:9:
>    In file included from include/linux/crypto.h:17:
>    In file included from include/linux/slab.h:16:
>    In file included from include/linux/gfp.h:7:
>    In file included from include/linux/mmzone.h:25:
>>> include/linux/zswap.h:53:43: warning: non-void function does not return a value [-Wreturn-type]
>    static inline int zswap_swapon(int type) {}

Ah, will fix to return 0 when !CONFIG_ZSWAP here.

Thanks!