tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.10 head: 9ced6633127bd25a94939777d9ecda54800859fc commit: 9af81b257c01533da218d79bbacf0b82febf4b26 [37/74] mei: bus: block send with vtag on non-conformat FW config: x86_64-randconfig-a006-20210318 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6db3ab2903f42712f44000afb5aa467efbd25f35) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-5.10 git checkout 9af81b257c01533da218d79bbacf0b82febf4b26 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): if (vtag) { ^~~~ stac arch/x86/include/asm/smap.h:50:29: note: 'stac' declared here static __always_inline void stac(void) ^ 1 error generated. vim +62 drivers/misc/mei/bus.c 22 23 /** 24 * __mei_cl_send - internal client send (write) 25 * 26 * @cl: host client 27 * @buf: buffer to send 28 * @length: buffer length 29 * @mode: sending mode 30 * 31 * Return: written size bytes or < 0 on error 32 */ 33 ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, 34 unsigned int mode) 35 { 36 struct mei_device *bus; 37 struct mei_cl_cb *cb; 38 ssize_t rets; 39 40 if (WARN_ON(!cl || !cl->dev)) 41 return -ENODEV; 42 43 bus = cl->dev; 44 45 mutex_lock(&bus->device_lock); 46 if (bus->dev_state != MEI_DEV_ENABLED) { 47 rets = -ENODEV; 48 goto out; 49 } 50 51 if (!mei_cl_is_connected(cl)) { 52 rets = -ENODEV; 53 goto out; 54 } 55 56 /* Check if we have an ME client device */ 57 if (!mei_me_cl_is_active(cl->me_cl)) { 58 rets = -ENOTTY; 59 goto out; 60 } 61 63 /* Check if vtag is supported by client */ 64 rets = mei_cl_vt_support_check(cl); 65 if (rets) 66 goto out; 67 } 68 69 if (length > mei_cl_mtu(cl)) { 70 rets = -EFBIG; 71 goto out; 72 } 73 74 while (cl->tx_cb_queued >= bus->tx_queue_limit) { 75 mutex_unlock(&bus->device_lock); 76 rets = wait_event_interruptible(cl->tx_wait, 77 cl->writing_state == MEI_WRITE_COMPLETE || 78 (!mei_cl_is_connected(cl))); 79 mutex_lock(&bus->device_lock); 80 if (rets) { 81 if (signal_pending(current)) 82 rets = -EINTR; 83 goto out; 84 } 85 if (!mei_cl_is_connected(cl)) { 86 rets = -ENODEV; 87 goto out; 88 } 89 } 90 91 cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, NULL); 92 if (!cb) { 93 rets = -ENOMEM; 94 goto out; 95 } 96 97 cb->internal = !!(mode & MEI_CL_IO_TX_INTERNAL); 98 cb->blocking = !!(mode & MEI_CL_IO_TX_BLOCKING); 99 memcpy(cb->buf.data, buf, length); 100 101 rets = mei_cl_write(cl, cb); 102 103 out: 104 mutex_unlock(&bus->device_lock); 105 106 return rets; 107 } 108 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org