linux-kernel - Re: [PATCH] video: fbdev: pm2fb: avoid stall on fb

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Message-ID: <202102210910.yLvjn62y-lkp@intel.com>
Date:   Sun, 21 Feb 2021 10:02:10 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tong Zhang <ztong0001@...il.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH] video: fbdev: pm2fb: avoid stall on fb_sync

Hi Tong,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.11 next-20210219]
[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]

url:    https://github.com/0day-ci/linux/commits/Tong-Zhang/video-fbdev-pm2fb-avoid-stall-on-fb_sync/20210221-070421
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f40ddce88593482919761f74910f42f4b84c004b
config: x86_64-randconfig-a003-20210221 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/77b85e0ba17f78b0335bf283901691ec3942dec3
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tong-Zhang/video-fbdev-pm2fb-avoid-stall-on-fb_sync/20210221-070421
        git checkout 77b85e0ba17f78b0335bf283901691ec3942dec3
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> drivers/video/fbdev/pm2fb.c:193:19: error: cannot combine with previous 'int' declaration specifier
   static int inline void WAIT_FIFO_TIMEOUT(struct pm2fb_par *p, u32 a)
                     ^
   1 error generated.


vim +/int +193 drivers/video/fbdev/pm2fb.c

   183	
   184	#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
   185	#define WAIT_FIFO(p, a)
   186	#define WAIT_FIFO_TIMEOUT(p, a) (0)
   187	#else
   188	static inline void WAIT_FIFO(struct pm2fb_par *p, u32 a)
   189	{
   190		while (pm2_RD(p, PM2R_IN_FIFO_SPACE) < a)
   191			cpu_relax();
   192	}
 > 193	static int inline void WAIT_FIFO_TIMEOUT(struct pm2fb_par *p, u32 a)
   194	{
   195		int timeout = 10000;
   196		while (pm2_RD(p, PM2R_IN_FIFO_SPACE) < a) {
   197			cpu_relax();
   198			if (--timeout==0)
   199				return 1;
   200		}
   201		return 0;
   202	}
   203	#endif
   204	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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