Hi Jorgen, I love your patch! Perhaps something to improve: [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on linux/master linus/master v5.17-rc2 next-20220202] [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/Jorgen-Hansen/VMCI-dma-dg-Add-support-for-DMA-datagrams/20220202-230034 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 7ab004dbcbee38b8a70798835d3ffcd97a985a5e config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220203/202202030100.5Mr551y1-lkp@xxxxxxxxx/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/303777a2a8daa11d529827395318bb698ddee57e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jorgen-Hansen/VMCI-dma-dg-Add-support-for-DMA-datagrams/20220202-230034 git checkout 303777a2a8daa11d529827395318bb698ddee57e # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/misc/vmw_vmci/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/misc/vmw_vmci/vmci_guest.c:103:14: warning: no previous prototype for 'vmci_read_reg' [-Wmissing-prototypes] 103 | unsigned int vmci_read_reg(struct vmci_guest_device *dev, u32 reg) | ^~~~~~~~~~~~~ drivers/misc/vmw_vmci/vmci_guest.c:110:6: warning: no previous prototype for 'vmci_write_reg' [-Wmissing-prototypes] 110 | void vmci_write_reg(struct vmci_guest_device *dev, u32 val, u32 reg) | ^~~~~~~~~~~~~~ >> drivers/misc/vmw_vmci/vmci_guest.c:118:5: warning: no previous prototype for 'vmci_write_data' [-Wmissing-prototypes] 118 | int vmci_write_data(struct vmci_guest_device *dev, struct vmci_datagram *dg) | ^~~~~~~~~~~~~~~ vim +/vmci_write_data +118 drivers/misc/vmw_vmci/vmci_guest.c 117 > 118 int vmci_write_data(struct vmci_guest_device *dev, struct vmci_datagram *dg) 119 { 120 int result; 121 122 if (dev->mmio_base != NULL) { 123 struct vmci_data_in_out_header *buffer_header = dev->tx_buffer; 124 u8 *dg_out_buffer = (u8 *)(buffer_header + 1); 125 126 if (VMCI_DG_SIZE(dg) > VMCI_MAX_DG_SIZE) 127 return VMCI_ERROR_INVALID_ARGS; 128 129 /* 130 * Initialize send buffer with outgoing datagram 131 * and set up header for inline data. Device will 132 * not access buffer asynchronously - only after 133 * the write to VMCI_DATA_OUT_LOW_ADDR. 134 */ 135 memcpy(dg_out_buffer, dg, VMCI_DG_SIZE(dg)); 136 buffer_header->opcode = 0; 137 buffer_header->size = VMCI_DG_SIZE(dg); 138 buffer_header->busy = 1; 139 140 vmci_write_reg(dev, lower_32_bits(dev->tx_buffer_base), 141 VMCI_DATA_OUT_LOW_ADDR); 142 143 /* Caller holds a spinlock, so cannot block. */ 144 spin_until_cond(buffer_header->busy == 0); 145 146 result = vmci_read_reg(vmci_dev_g, VMCI_RESULT_LOW_ADDR); 147 if (result == VMCI_SUCCESS) 148 result = (int)buffer_header->result; 149 } else { 150 iowrite8_rep(dev->iobase + VMCI_DATA_OUT_ADDR, 151 dg, VMCI_DG_SIZE(dg)); 152 result = vmci_read_reg(vmci_dev_g, VMCI_RESULT_LOW_ADDR); 153 } 154 155 return result; 156 } 157 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
