Hi Adrián,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master] [also build test ERROR on v6.11-rc7 next-20240913] [cannot apply to drm-misc/drm-misc-next] [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#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Adri-n-Larumbe/drm-panthor-in... base: linus/master patch link: https://lore.kernel.org/r/20240913124857.389630-2-adrian.larumbe%40collabora... patch subject: [PATCH v6 1/5] drm/panthor: introduce job cycle and timestamp accounting config: i386-buildonly-randconfig-003-20240915 (https://download.01.org/0day-ci/archive/20240915/202409152243.r3t2jdOJ-lkp@i...) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240915/202409152243.r3t2jdOJ-lkp@i...)

If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot lkp@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202409152243.r3t2jdOJ-lkp@intel.com/

All errors (new ones prefixed by >>):

...

drivers/gpu/drm/panthor/panthor_sched.c:2885:12: error: call to '__compiletime_assert_371' declared with 'error' attribute: min(ringbuf_size - start, size) signedness error

2885 | written = min(ringbuf_size - start, size); | ^ include/linux/minmax.h:129:19: note: expanded from macro 'min' 129 | #define min(x, y) __careful_cmp(min, x, y) | ^ include/linux/minmax.h:105:2: note: expanded from macro '__careful_cmp' 105 | __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_)) | ^ include/linux/minmax.h:100:2: note: expanded from macro '__careful_cmp_once' 100 | BUILD_BUG_ON_MSG(!__types_ok(x,y,ux,uy), \ | ^ note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:498:2: note: expanded from macro '_compiletime_assert' 498 | __compiletime_assert(condition, msg, prefix, suffix) | ^ include/linux/compiler_types.h:491:4: note: expanded from macro '__compiletime_assert' 491 | prefix ## suffix(); \ | ^ <scratch space>:68:1: note: expanded from here 68 | __compiletime_assert_371 | ^ 1 error generated.

vim +2885 drivers/gpu/drm/panthor/panthor_sched.c

2862 2863 #define JOB_INSTR(__prof, __instr) \ 2864 { \ 2865 .profile_mask = __prof, \ 2866 .instr = __instr, \ 2867 } 2868 2869 static void 2870 copy_instrs_to_ringbuf(struct panthor_queue *queue, 2871 struct panthor_job *job, 2872 struct panthor_job_ringbuf_instrs *instrs) 2873 { 2874 ssize_t ringbuf_size = panthor_kernel_bo_size(queue->ringbuf); 2875 u32 start = job->ringbuf.start & (ringbuf_size - 1); 2876 ssize_t size, written; 2877 2878 /* 2879 * We need to write a whole slot, including any trailing zeroes 2880 * that may come at the end of it. Also, because instrs.buffer has 2881 * been zero-initialised, there's no need to pad it with 0's 2882 */ 2883 instrs->count = ALIGN(instrs->count, NUM_INSTRS_PER_CACHE_LINE); 2884 size = instrs->count * sizeof(u64);

2885 written = min(ringbuf_size - start, size);

2886 2887 memcpy(queue->ringbuf->kmap + start, instrs->buffer, written); 2888 2889 if (written < size) 2890 memcpy(queue->ringbuf->kmap, 2891 &instrs->buffer[(ringbuf_size - start)/sizeof(u64)], 2892 size - written); 2893 } 2894