Hi Kang, [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: sparc-allyesconfig (attached as .config) compiler: sparc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 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=sparc All warnings (new ones prefixed by >>): drivers/fpga/intel/fme-pr.c: In function 'fme_pr': >> drivers/fpga/intel/fme-pr.c:278:30: warning: passing argument 2 of >> 'access_ok' makes pointer from integer without a cast [-Wint-conversion] if (!access_ok(VERIFY_READ, port_pr.buffer_address, ^~~~~~~ In file included from arch/sparc/include/asm/uaccess.h:4:0, from include/linux/uaccess.h:5, from drivers/fpga/intel/fme-pr.c:25: arch/sparc/include/asm/uaccess_64.h:80:19: note: expected 'const void *' but argument is of type '__u64 {aka long long unsigned int}' static inline int access_ok(int type, const void __user * addr, unsigned long size) ^~~~~~~~~ vim +/access_ok +278 drivers/fpga/intel/fme-pr.c 262 if (!IS_ALIGNED(port_pr.buffer_size, 4)) 263 return -EINVAL; 264 265 /* get fme header region */ 266 fme_hdr = get_feature_ioaddr_by_index(&pdev->dev, 267 FME_FEATURE_ID_HEADER); 268 if (WARN_ON(!fme_hdr)) 269 return -EINVAL; 270 271 /* check port id */ 272 fme_capability.csr = readq(&fme_hdr->capability); 273 if (port_pr.port_id >= fme_capability.num_ports) { 274 dev_dbg(&pdev->dev, "port number more than maximum\n"); 275 return -EINVAL; 276 } 277 > 278 if (!access_ok(VERIFY_READ, port_pr.buffer_address, 279 port_pr.buffer_size)) 280 return -EFAULT; 281 282 buf = vmalloc(port_pr.buffer_size); 283 if (!buf) 284 return -ENOMEM; 285 286 if (copy_from_user(buf, (void __user *)port_pr.buffer_address, --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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