Re: [PATCH v2 2/2] fpga: Add support for Xilinx LogiCORE PR Decoupler

[kbuild test robot]

Hi Moritz,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.11-rc2 next-20170310]
[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/Moritz-Fischer/doc-Add-bindings-document-for-Xilinx-LogiCore-PR-Decoupler/20170320-005406
config: ia64-allmodconfig (attached as .config)
compiler: ia64-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=ia64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/io.h:25:0,
                    from drivers/fpga/xilinx-pr-decoupler.c:19:
   drivers/fpga/xilinx-pr-decoupler.c: In function 
'xlnx_pr_decoupler_enable_set':
   arch/ia64/include/asm/io.h:395:30: warning: large integer implicitly 
truncated to unsigned type [-Woverflow]
    #define writel(v,a) __writel((v), (a))
                                 ^
>> drivers/fpga/xilinx-pr-decoupler.c:43:3: note: in expansion of macro 'writel'
      writel(CTRL_CMD_COUPLE, priv->io_base);
      ^~~~~~

vim +/writel +43 drivers/fpga/xilinx-pr-decoupler.c

    13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    15   * GNU General Public License for more details.
    16   */
    17  
    18  #include <linux/clk.h>
  > 19  #include <linux/io.h>
    20  #include <linux/kernel.h>
    21  #include <linux/of_device.h>
    22  #include <linux/module.h>
    23  #include <linux/fpga/fpga-bridge.h>
    24  
    25  #define CTRL_CMD_DECOUPLE       BIT(0)
    26  #define CTRL_CMD_COUPLE         ~BIT(0)
    27  
    28  struct xlnx_pr_decoupler_data {
    29          void __iomem *io_base;
    30          struct clk *clk;
    31  };
    32  
    33  static int xlnx_pr_decoupler_enable_set(struct fpga_bridge *bridge, 
bool enable)
    34  {
    35          int err;
    36          struct xlnx_pr_decoupler_data *priv = bridge->priv;
    37  
    38          err = clk_enable(priv->clk);
    39          if (err)
    40                  return err;
    41  
    42          if (enable)
  > 43                  writel(CTRL_CMD_COUPLE, priv->io_base);
    44          else
    45                  writel(CTRL_CMD_DECOUPLE, priv->io_base);
    46  

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

.config.gz
Description: application/gzip