Hi Nava, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 38a288f5941ef03752887ad86f2d85442358c99a commit: ada14a023a641107da1ada546e1d345ca3dc78a5 [4615/9759] fpga: zynq: Fix incorrect variable type config: mips-randconfig-c004-20220506 (https://download.01.org/0day-ci/archive/20220506/202205061916.MQGByNg6-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5e004fb787698440a387750db7f8028e7cb14cfc) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ada14a023a641107da1ada546e1d345ca3dc78a5 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout ada14a023a641107da1ada546e1d345ca3dc78a5 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/fpga/ 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/fpga/zynq-fpga.c:246:14: warning: result of comparison of constant 170 with expression of type 'const char' is always false [-Wtautological-constant-out-of-range-compare] buf[3] == 0xaa) ~~~~~~ ^ ~~~~ drivers/fpga/zynq-fpga.c:245:50: warning: result of comparison of constant 153 with expression of type 'const char' is always false [-Wtautological-constant-out-of-range-compare] if (buf[0] == 0x66 && buf[1] == 0x55 && buf[2] == 0x99 && ~~~~~~ ^ ~~~~ 2 warnings generated. vim +246 drivers/fpga/zynq-fpga.c 37784706bf9e3b Moritz Fischer 2015-10-16 237 b496df86ac1bbe Jason Gunthorpe 2017-02-01 238 /* Sanity check the proposed bitstream. It must start with the sync word in b496df86ac1bbe Jason Gunthorpe 2017-02-01 239 * the correct byte order, and be dword aligned. The input is a Xilinx .bin b496df86ac1bbe Jason Gunthorpe 2017-02-01 240 * file with every 32 bit quantity swapped. b496df86ac1bbe Jason Gunthorpe 2017-02-01 241 */ ada14a023a6411 Nava kishore Manne 2022-04-21 242 static bool zynq_fpga_has_sync(const char *buf, size_t count) b496df86ac1bbe Jason Gunthorpe 2017-02-01 243 { b496df86ac1bbe Jason Gunthorpe 2017-02-01 244 for (; count >= 4; buf += 4, count -= 4) b496df86ac1bbe Jason Gunthorpe 2017-02-01 245 if (buf[0] == 0x66 && buf[1] == 0x55 && buf[2] == 0x99 && b496df86ac1bbe Jason Gunthorpe 2017-02-01 @246 buf[3] == 0xaa) b496df86ac1bbe Jason Gunthorpe 2017-02-01 247 return true; b496df86ac1bbe Jason Gunthorpe 2017-02-01 248 return false; b496df86ac1bbe Jason Gunthorpe 2017-02-01 249 } b496df86ac1bbe Jason Gunthorpe 2017-02-01 250 :::::: The code at line 246 was first introduced by commit :::::: b496df86ac1bbe393a55ddbfed35d46e74ef9767 fpga zynq: Check the bitstream for validity :::::: TO: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://01.org/lkp
