Hi Ricardo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [cannot apply to v5.3 next-20190930] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Ricardo-Ribalda-Delgado/Implemen... base: git://linuxtv.org/media_tree.git master reproduce: # apt-get install sparse # sparse version: v0.6.1-rc1-37-gd466a02-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +84 include/media/v4l2-ctrls.h 0176077a813933 Hans Verkuil 2014-04-27 75 ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 76 /** ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 77 * v4l2_ctrl_ptr() - Helper function to return a v4l2_ctrl_ptr from a ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 78 * void pointer ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 79 * @ptr: The void pointer ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 80 */ ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 81 static inline union v4l2_ctrl_ptr v4l2_ctrl_ptr_from_void(void *ptr) ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 82 { ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 83 BUILD_BUG_ON(sizeof(union v4l2_ctrl_ptr) != sizeof(void *)); ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 @84 return (union v4l2_ctrl_ptr) ptr; ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 85 } ba17c23180bad2 Ricardo Ribalda Delgado 2019-09-30 86 :::::: The code at line 84 was first introduced by commit :::::: ba17c23180bad2a150b4094b28c9df8aa6195621 media: v4l2-ctrl: Add new helper v4l2_ctrl_ptr_from_void :::::: TO: Ricardo Ribalda Delgado <ribalda(a)kernel.org&gt; :::::: CC: 0day robot <lkp(a)intel.com&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation