drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c:688:31: warning: variable 'cmd_enc' set but not used

From: kernel test robot
Date: Mon May 31 2021 - 19:01:50 EST


Hi AngeloGioacchino,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c2131f7e73c9e9365613e323d65c7b9e5b910f56
commit: fe286893ed34b12684659d3efb907d47fe18559b drm/msm/dpu: Remove unused call in wait_for_commit_done
date: 4 months ago
config: arm-randconfig-r012-20210531 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fe286893ed34b12684659d3efb907d47fe18559b
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout fe286893ed34b12684659d3efb907d47fe18559b
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm

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

All warnings (new ones prefixed by >>):

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c: In function 'dpu_encoder_phys_cmd_wait_for_commit_done':
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c:688:31: warning: variable 'cmd_enc' set but not used [-Wunused-but-set-variable]
688 | struct dpu_encoder_phys_cmd *cmd_enc;
| ^~~~~~~


vim +/cmd_enc +688 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c

25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 684
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 685 static int dpu_encoder_phys_cmd_wait_for_commit_done(
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 686 struct dpu_encoder_phys *phys_enc)
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 687 {
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 @688 struct dpu_encoder_phys_cmd *cmd_enc;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 689
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 690 cmd_enc = to_dpu_encoder_phys_cmd(phys_enc);
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 691
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 692 /* only required for master controller */
fe286893ed34b1 AngeloGioacchino Del Regno 2021-01-12 693 if (!dpu_encoder_phys_cmd_is_master(phys_enc))
fe286893ed34b1 AngeloGioacchino Del Regno 2021-01-12 694 return 0;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 695
fe286893ed34b1 AngeloGioacchino Del Regno 2021-01-12 696 return _dpu_encoder_phys_cmd_wait_for_ctl_start(phys_enc);
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 697 }
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 698

:::::: The code at line 688 was first introduced by commit
:::::: 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef drm/msm: Add SDM845 DPU support

:::::: TO: Jeykumar Sankaran <jsanka@xxxxxxxxxxxxxx>
:::::: CC: Sean Paul <seanpaul@xxxxxxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip