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: alpha-allyesconfig (attached as .config) compiler: alpha-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=alpha All warnings (new ones prefixed by >>): drivers/fpga/xilinx-pr-decoupler.c: In function 'xlnx_pr_decoupler_enable_set': >> drivers/fpga/xilinx-pr-decoupler.c:26:26: warning: large integer implicitly truncated to unsigned type [-Woverflow] #define CTRL_CMD_COUPLE ~BIT(0) ^ >> drivers/fpga/xilinx-pr-decoupler.c:43:10: note: in expansion of macro 'CTRL_CMD_COUPLE' writel(CTRL_CMD_COUPLE, priv->io_base); ^~~~~~~~~~~~~~~ vim +26 drivers/fpga/xilinx-pr-decoupler.c 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
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