Hi Wu, [auto build test WARNING on linus/master] [also build test WARNING on v4.11-rc4 next-20170331] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Wu-Hao/Intel-FPGA-Device-Drivers/20170401-052017 config: frv-allmodconfig (attached as .config) compiler: frv-linux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=frv All warnings (new ones prefixed by >>): In file included from include/linux/uaccess.h:5:0, from drivers/fpga/intel/afu-dma-region.c:17: drivers/fpga/intel/afu-dma-region.c: In function 'afu_dma_map_region': arch/frv/include/asm/uaccess.h:63:47: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] #define access_ok(type,addr,size) (__range_ok((void __user *)(addr), (size)) == 0) ^ arch/frv/include/asm/uaccess.h:61:60: note: in definition of macro '__range_ok' #define __range_ok(addr,size) ___range_ok((unsigned long) (addr), (unsigned long) (size)) ^~~~ >> drivers/fpga/intel/afu-dma-region.c:291:7: note: in expansion of macro >> 'access_ok' if (!access_ok(VERIFY_WRITE, user_addr, length)) ^~~~~~~~~ vim +/access_ok +291 drivers/fpga/intel/afu-dma-region.c 275 u64 user_addr, u64 length, u64 *iova) 276 { 277 struct fpga_afu_dma_region *region; 278 int ret; 279 280 /* 281 * Check Inputs, only accept page-aligned user memory region with 282 * valid length. 283 */ 284 if (!PAGE_ALIGNED(user_addr) || !PAGE_ALIGNED(length) || !length) 285 return -EINVAL; 286 287 /* Check overflow */ 288 if (user_addr + length < user_addr) 289 return -EINVAL; 290 > 291 if (!access_ok(VERIFY_WRITE, user_addr, length)) 292 return -EINVAL; 293 294 region = kzalloc(sizeof(*region), GFP_KERNEL); 295 if (!region) 296 return -ENOMEM; 297 298 region->user_addr = user_addr; 299 region->length = length; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
Description: application/gzip
