tree: https://github.com/Xilinx/linux-xlnx master head: 319e5bc767fe351a63744daa9cdd69b1915956d0 commit: e24d5dbb603552c4cb9c9e946c78055a60f83d85 [12/20] misc: ai-engine: Add FPGA bridge to AI engine partition config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout e24d5dbb603552c4cb9c9e946c78055a60f83d85 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/kernfs.h:12, from include/linux/sysfs.h:16, from include/linux/kobject.h:20, from include/linux/cdev.h:5, from drivers/misc/xilinx-ai-engine/ai-engine-internal.h:12, from drivers/misc/xilinx-ai-engine/ai-engine-fpga.c:8: drivers/misc/xilinx-ai-engine/ai-engine-fpga.c: In function 'aie_fpga_bridge_enable_set': include/linux/mutex.h:154:40: warning: ignoring return value of 'mutex_lock_interruptible_nested', declared with attribute warn_unused_result [-Wunused-result] 154 | #define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 21 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-fpga.c: In function 'aie_fpga_bridge_enable_show': include/linux/mutex.h:154:40: warning: ignoring return value of 'mutex_lock_interruptible_nested', declared with attribute warn_unused_result [-Wunused-result] 154 | #define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-fpga.c:35:2: note: in expansion of macro 'mutex_lock_interruptible' 35 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/mutex_lock_interruptible +21 drivers/misc/xilinx-ai-engine/ai-engine-fpga.c 9 10 static int aie_fpga_bridge_enable_set(struct fpga_bridge *bridge, bool enable) 11 { 12 struct aie_partition *apart = bridge->priv; 13 14 /* 15 * TBD: 16 * "Enable" should enable the SHIM tile configuration. 17 * "Disable" should should disable SHIM DMAs, and wait 18 * until SHIM DMA stops, and disable SHIM 19 * to PL streams within partition. 20 */ 22 if (enable) 23 apart->status |= XAIE_PART_STATUS_BRIDGE_ENABLED; 24 else 25 apart->status &= ~XAIE_PART_STATUS_BRIDGE_ENABLED; 26 mutex_unlock(&apart->mlock); 27 return 0; 28 } 29 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org