Hi Arnaud, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [cannot apply to v5.3-rc6 next-20190829] [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/Arnaud-Pouliquen/rpmsg-core-add-API-to-get-message-length/20190829-222443 config: sparc64-allmodconfig (attached as .config) compiler: sparc64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=sparc64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from include/linux/list.h:9:0, from include/linux/module.h:9, from drivers/tty/rpmsg_tty.c:7: drivers/tty/rpmsg_tty.c: In function 'rpmsg_tty_write': include/linux/kernel.h:821:29: warning: comparison of distinct pointer types lacks a cast (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ^ include/linux/kernel.h:835:4: note: in expansion of macro '__typecheck' (__typecheck(x, y) && __no_side_effects(x, y)) ^~~~~~~~~~~ include/linux/kernel.h:845:24: note: in expansion of macro '__safe_cmp' __builtin_choose_expr(__safe_cmp(x, y), \ ^~~~~~~~~~ include/linux/kernel.h:854:19: note: in expansion of macro '__careful_cmp' #define min(x, y) __careful_cmp(x, y, <) ^~~~~~~~~~~~~ >> drivers/tty/rpmsg_tty.c:152:13: note: in expansion of macro 'min' msg_size = min(len, msg_max_size); ^~~ vim +/min +152 drivers/tty/rpmsg_tty.c 132 133 static int rpmsg_tty_write(struct tty_struct *tty, const u8 *buf, int len) 134 { 135 struct rpmsg_tty_port *cport = tty->driver_data; 136 struct rpmsg_device *rpdev; 137 ssize_t msg_max_size, msg_size; 138 int ret; 139 u8 *tmpbuf; 140 141 /* If cts not set, the message is not sent*/ 142 if (!cport->cts) 143 return 0; 144 145 rpdev = cport->rpdev; 146 147 dev_dbg(&rpdev->dev, "%s: send msg from tty->index = %d, len = %d\n", 148 __func__, tty->index, len); 149 150 msg_max_size = rpmsg_get_mtu(rpdev->ept); 151 > 152 msg_size = min(len, msg_max_size); 153 tmpbuf = kzalloc(msg_size, GFP_KERNEL); 154 if (!tmpbuf) 155 return -ENOMEM; 156 157 memcpy(tmpbuf, buf, msg_size); 158 159 /* 160 * Try to send the message to remote processor, if failed return 0 as 161 * no data sent 162 */ 163 ret = rpmsg_trysendto(cport->d_ept, tmpbuf, msg_size, cport->data_dst); 164 kfree(tmpbuf); 165 if (ret) { 166 dev_dbg(&rpdev->dev, "rpmsg_send failed: %d\n", ret); 167 return 0; 168 } 169 170 return msg_size; 171 } 172 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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