Hi Tzu-En,
First bad commit (maybe != root cause):
tree:
https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-ne...
master
head: b28bd97c1c191ade3736b33f2b24e5b288b90ab4
commit: f745eb9ca5bf823bc5c0f82a434cefb41c57844e [40/69] rtw88: 8821c: Add 8821CE to
Kconfig and Makefile
config: x86_64-allyesconfig (attached as .config)
compiler: clang version 11.0.0 (
https://github.com/llvm/llvm-project
02946de3802d3bc65bc9f2eb9b8d4969b5a7add8)
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
git checkout f745eb9ca5bf823bc5c0f82a434cefb41c57844e
# 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(a)intel.com>
All warnings (new ones prefixed by >>):
> drivers/net/wireless/realtek/rtw88/rtw8821c.c:71:8: warning:
'const' type qualifier on return type has no effect [-Wignored-qualifiers]
static const u8 rtw8821c_get_swing_index(struct rtw_dev *rtwdev)
^~~~~~
1 warning generated.
vim +/const +71 drivers/net/wireless/realtek/rtw88/rtw8821c.c
3a4312828ce13e Tzu-En Huang 2020-06-03 70
3a4312828ce13e Tzu-En Huang 2020-06-03 @71 static const u8
rtw8821c_get_swing_index(struct rtw_dev *rtwdev)
3a4312828ce13e Tzu-En Huang 2020-06-03 72 {
3a4312828ce13e Tzu-En Huang 2020-06-03 73 u8 i = 0;
3a4312828ce13e Tzu-En Huang 2020-06-03 74 u32 swing, table_value;
3a4312828ce13e Tzu-En Huang 2020-06-03 75
3a4312828ce13e Tzu-En Huang 2020-06-03 76 swing = rtw_read32_mask(rtwdev,
REG_TXSCALE_A, 0xffe00000);
3a4312828ce13e Tzu-En Huang 2020-06-03 77 for (i = 0; i <
ARRAY_SIZE(rtw8821c_txscale_tbl); i++) {
3a4312828ce13e Tzu-En Huang 2020-06-03 78 table_value = rtw8821c_txscale_tbl[i];
3a4312828ce13e Tzu-En Huang 2020-06-03 79 if (swing == table_value)
3a4312828ce13e Tzu-En Huang 2020-06-03 80 break;
3a4312828ce13e Tzu-En Huang 2020-06-03 81 }
3a4312828ce13e Tzu-En Huang 2020-06-03 82
3a4312828ce13e Tzu-En Huang 2020-06-03 83 return i;
3a4312828ce13e Tzu-En Huang 2020-06-03 84 }
3a4312828ce13e Tzu-En Huang 2020-06-03 85
:::::: The code at line 71 was first introduced by commit
:::::: 3a4312828ce13e1645fd3af76e4314a2623b3361 rtw88: 8821c: add power tracking
:::::: TO: Tzu-En Huang <tehuang(a)realtek.com>
:::::: CC: Kalle Valo <kvalo(a)codeaurora.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org