+Evgeniy for W1 Dallas
+Alex & Christian for RADEON

Le 07/03/2021 à 11:23, kernel test robot a écrit :
Hi Christophe,

I love your patch! Perhaps something to improve:

[auto build test WARNING on powerpc/next]
[also build test WARNING on v5.12-rc2 next-20210305]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    
https://github.com/0day-ci/linux/commits/Christophe-Leroy/powerpc-Cleanup-of-uaccess-h/20210226-015715
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-randconfig-s031-20210307 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
reproduce:
         wget 
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
         chmod +x ~/bin/make.cross
         # apt-get install sparse
         # sparse version: v0.6.3-245-gacc5c298-dirty
         # 
https://github.com/0day-ci/linux/commit/449bdbf978936e67e4919be8be0eec3e490a65e2
         git remote add linux-review https://github.com/0day-ci/linux
         git fetch --no-tags linux-review 
Christophe-Leroy/powerpc-Cleanup-of-uaccess-h/20210226-015715
         git checkout 449bdbf978936e67e4919be8be0eec3e490a65e2
         # save the attached .config to linux build tree
         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>


The mentioned patch is not the source of the problem, it only allows to spot it.

Christophe



"sparse warnings: (new ones prefixed by >>)"
drivers/w1/slaves/w1_ds28e04.c:342:13: sparse: sparse: incorrect type in 
initializer (different address spaces) @@     expected char [noderef] __user 
*_pu_addr @@     got char *buf @@
    drivers/w1/slaves/w1_ds28e04.c:342:13: sparse:     expected char [noderef] 
__user *_pu_addr
    drivers/w1/slaves/w1_ds28e04.c:342:13: sparse:     got char *buf
drivers/w1/slaves/w1_ds28e04.c:356:13: sparse: sparse: incorrect type in 
initializer (different address spaces) @@     expected char const [noderef] 
__user *_gu_addr @@     got char const *buf @@
    drivers/w1/slaves/w1_ds28e04.c:356:13: sparse:     expected char const 
[noderef] __user *_gu_addr
    drivers/w1/slaves/w1_ds28e04.c:356:13: sparse:     got char const *buf
--
    drivers/gpu/drm/radeon/radeon_ttm.c:933:21: sparse: sparse: cast removes 
address space '__user' of expression
    drivers/gpu/drm/radeon/radeon_ttm.c:933:21: sparse: sparse: cast removes 
address space '__user' of expression
drivers/gpu/drm/radeon/radeon_ttm.c:933:21: sparse: sparse: incorrect type in 
initializer (different address spaces) @@     expected unsigned int [noderef] 
__user *_pu_addr @@     got unsigned int [usertype] * @@
    drivers/gpu/drm/radeon/radeon_ttm.c:933:21: sparse:     expected unsigned 
int [noderef] __user *_pu_addr
    drivers/gpu/drm/radeon/radeon_ttm.c:933:21: sparse:     got unsigned int 
[usertype] *
    drivers/gpu/drm/radeon/radeon_ttm.c:933:21: sparse: sparse: cast removes 
address space '__user' of expression

vim +342 drivers/w1/slaves/w1_ds28e04.c

fa33a65a9cf7e2 Greg Kroah-Hartman 2013-08-21  338
fa33a65a9cf7e2 Greg Kroah-Hartman 2013-08-21  339  static ssize_t 
crccheck_show(struct device *dev, struct device_attribute *attr,
fa33a65a9cf7e2 Greg Kroah-Hartman 2013-08-21  340                            
char *buf)
fbf7f7b4e2ae40 Markus Franke      2012-05-26  341  {
fbf7f7b4e2ae40 Markus Franke      2012-05-26 @342       if 
(put_user(w1_enable_crccheck + 0x30, buf))
fbf7f7b4e2ae40 Markus Franke      2012-05-26  343               return -EFAULT;
fbf7f7b4e2ae40 Markus Franke      2012-05-26  344
fbf7f7b4e2ae40 Markus Franke      2012-05-26  345       return 
sizeof(w1_enable_crccheck);
fbf7f7b4e2ae40 Markus Franke      2012-05-26  346  }
fbf7f7b4e2ae40 Markus Franke      2012-05-26  347
fa33a65a9cf7e2 Greg Kroah-Hartman 2013-08-21  348  static ssize_t 
crccheck_store(struct device *dev, struct device_attribute *attr,
fbf7f7b4e2ae40 Markus Franke      2012-05-26  349                             
const char *buf, size_t count)
fbf7f7b4e2ae40 Markus Franke      2012-05-26  350  {
fbf7f7b4e2ae40 Markus Franke      2012-05-26  351       char val;
fbf7f7b4e2ae40 Markus Franke      2012-05-26  352
fbf7f7b4e2ae40 Markus Franke      2012-05-26  353       if (count != 1 || !buf)
fbf7f7b4e2ae40 Markus Franke      2012-05-26  354               return -EINVAL;
fbf7f7b4e2ae40 Markus Franke      2012-05-26  355
fbf7f7b4e2ae40 Markus Franke      2012-05-26 @356       if (get_user(val, buf))
fbf7f7b4e2ae40 Markus Franke      2012-05-26  357               return -EFAULT;
fbf7f7b4e2ae40 Markus Franke      2012-05-26  358
fbf7f7b4e2ae40 Markus Franke      2012-05-26  359       /* convert to decimal */
fbf7f7b4e2ae40 Markus Franke      2012-05-26  360       val = val - 0x30;
fbf7f7b4e2ae40 Markus Franke      2012-05-26  361       if (val != 0 && val != 
1)
fbf7f7b4e2ae40 Markus Franke      2012-05-26  362               return -EINVAL;
fbf7f7b4e2ae40 Markus Franke      2012-05-26  363
fbf7f7b4e2ae40 Markus Franke      2012-05-26  364       /* set the new value */
fbf7f7b4e2ae40 Markus Franke      2012-05-26  365       w1_enable_crccheck = 
val;
fbf7f7b4e2ae40 Markus Franke      2012-05-26  366
fbf7f7b4e2ae40 Markus Franke      2012-05-26  367       return 
sizeof(w1_enable_crccheck);
fbf7f7b4e2ae40 Markus Franke      2012-05-26  368  }
fbf7f7b4e2ae40 Markus Franke      2012-05-26  369

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

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