Hi Sasha, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on linus/master] [also build test WARNING on v5.7-rc6 next-20200519] [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/Sasha-Levin/DirectX-on-Linux/202... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 642b151f45dd54809ea00ecd3976a56c1ec9b53d config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 135b877874fae96b4372c8a3fbfaa8ff44ff86e3) reproduce: 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 # 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: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): uint get_instance(d3dkmt_handle h) ^ drivers/gpu/dxgkrnl/hmgr.c:91:1: note: declare 'static' if the function is not intended to be used outside of this translation unit uint get_instance(d3dkmt_handle h) ^ static void print_status(struct hmgrtable *table) ^ drivers/gpu/dxgkrnl/hmgr.c:178:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void print_status(struct hmgrtable *table) ^ static enum hmgrentry_type hmgrtable_get_entry_type(struct hmgrtable *table, ^ drivers/gpu/dxgkrnl/hmgr.c:549:1: note: declare 'static' if the function is not intended to be used outside of this translation unit enum hmgrentry_type hmgrtable_get_entry_type(struct hmgrtable *table, ^ static drivers/gpu/dxgkrnl/hmgr.c:173:20: warning: unused function 'is_empty' [-Wunused-function] static inline bool is_empty(struct hmgrtable *table) ^ 4 warnings generated. -- void dxgdevice_mark_destroyed(struct dxgdevice *device) ^ drivers/gpu/dxgkrnl/dxgadapter.c:281:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void dxgdevice_mark_destroyed(struct dxgdevice *device) ^ static refcount_inc_not_zero(&resource->refcount); ^~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~ drivers/gpu/dxgkrnl/dxgadapter.c:1326:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result] refcount_inc_not_zero(&syncobj->refcount); ^~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~ 3 warnings generated. -- In file included from drivers/gpu/dxgkrnl/ioctl.c:21: drivers/gpu/dxgkrnl/dxgvmbus.h:826:26: warning: implicit conversion from enumeration type 'enum dxgkvmb_commandtype' to different enumeration type 'enum dxgkvmb_commandtype_global' [-Wenum-conversion] command->command_type = DXGK_VMBCOMMAND_INVALID; ~ ^~~~~~~~~~~~~~~~~~~~~~~ int validate_alloc(struct dxgallocation *alloc0, ^ drivers/gpu/dxgkrnl/ioctl.c:1568:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int validate_alloc(struct dxgallocation *alloc0, ^ static int assign_resource_handles(struct dxgprocess *process, ^ drivers/gpu/dxgkrnl/ioctl.c:4734:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int assign_resource_handles(struct dxgprocess *process, ^ static int open_resource(struct dxgprocess *process, ^ drivers/gpu/dxgkrnl/ioctl.c:4793:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int open_resource(struct dxgprocess *process, ^ static 4 warnings generated. -- In file included from drivers/gpu/dxgkrnl/dxgvmbus.c:22: drivers/gpu/dxgkrnl/dxgvmbus.h:826:26: warning: implicit conversion from enumeration type 'enum dxgkvmb_commandtype' to different enumeration type 'enum dxgkvmb_commandtype_global' [-Wenum-conversion] command->command_type = DXGK_VMBCOMMAND_INVALID; ~ ^~~~~~~~~~~~~~~~~~~~~~~ void signal_guest_event(struct dxgkvmb_command_host_to_vm *packet, ^ drivers/gpu/dxgkrnl/dxgvmbus.c:108:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void signal_guest_event(struct dxgkvmb_command_host_to_vm *packet, ^ static void process_inband_packet(struct dxgvmbuschannel *channel, ^ drivers/gpu/dxgkrnl/dxgvmbus.c:126:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void process_inband_packet(struct dxgvmbuschannel *channel, ^ static void process_completion_packet(struct dxgvmbuschannel *channel, ^ drivers/gpu/dxgkrnl/dxgvmbus.c:158:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void process_completion_packet(struct dxgvmbuschannel *channel, ^ static int create_existing_sysmem(struct dxgdevice *device, ^ drivers/gpu/dxgkrnl/dxgvmbus.c:785:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int create_existing_sysmem(struct dxgdevice *device, ^ static drivers/gpu/dxgkrnl/dxgvmbus.c:88:20: warning: unused function 'command_vm_to_host_init0' [-Wunused-function] static inline void command_vm_to_host_init0(struct dxgkvmb_command_vm_to_host ^ 6 warnings generated. vim +/get_instance +91 drivers/gpu/dxgkrnl/hmgr.c 9cc562c3695b5b Sasha Levin 2020-05-19 90 9cc562c3695b5b Sasha Levin 2020-05-19 @91 uint get_instance(d3dkmt_handle h) 9cc562c3695b5b Sasha Levin 2020-05-19 92 { 9cc562c3695b5b Sasha Levin 2020-05-19 93 return (h & HMGRHANDLE_INSTANCE_MASK) >> HMGRHANDLE_INSTANCE_SHIFT; 9cc562c3695b5b Sasha Levin 2020-05-19 94 } 9cc562c3695b5b Sasha Levin 2020-05-19 95 9cc562c3695b5b Sasha Levin 2020-05-19 96 static bool is_handle_valid(struct hmgrtable *table, d3dkmt_handle h, 9cc562c3695b5b Sasha Levin 2020-05-19 97 bool ignore_destroyed, enum hmgrentry_type t) 9cc562c3695b5b Sasha Levin 2020-05-19 98 { 9cc562c3695b5b Sasha Levin 2020-05-19 99 uint index = get_index(h); 9cc562c3695b5b Sasha Levin 2020-05-19 100 uint unique = get_unique(h); 9cc562c3695b5b Sasha Levin 2020-05-19 101 struct hmgrentry *entry; 9cc562c3695b5b Sasha Levin 2020-05-19 102 9cc562c3695b5b Sasha Levin 2020-05-19 103 if (index >= table->table_size) { 9cc562c3695b5b Sasha Levin 2020-05-19 104 pr_err("%s Invalid index %x %d\n", __func__, h, index); 9cc562c3695b5b Sasha Levin 2020-05-19 105 return false; 9cc562c3695b5b Sasha Levin 2020-05-19 106 } 9cc562c3695b5b Sasha Levin 2020-05-19 107 9cc562c3695b5b Sasha Levin 2020-05-19 108 entry = &table->entry_table[index]; 9cc562c3695b5b Sasha Levin 2020-05-19 109 if (unique != entry->unique) { 9cc562c3695b5b Sasha Levin 2020-05-19 110 pr_err("%s Invalid unique %x %d %d %d %p", 9cc562c3695b5b Sasha Levin 2020-05-19 111 __func__, h, unique, entry->unique, 9cc562c3695b5b Sasha Levin 2020-05-19 112 index, entry->object); 9cc562c3695b5b Sasha Levin 2020-05-19 113 return false; 9cc562c3695b5b Sasha Levin 2020-05-19 114 } 9cc562c3695b5b Sasha Levin 2020-05-19 115 9cc562c3695b5b Sasha Levin 2020-05-19 116 if (entry->destroyed && !ignore_destroyed) { 9cc562c3695b5b Sasha Levin 2020-05-19 117 pr_err("%s Invalid destroyed", __func__); 9cc562c3695b5b Sasha Levin 2020-05-19 118 return false; 9cc562c3695b5b Sasha Levin 2020-05-19 119 } 9cc562c3695b5b Sasha Levin 2020-05-19 120 9cc562c3695b5b Sasha Levin 2020-05-19 121 if (entry->type == HMGRENTRY_TYPE_FREE) { 9cc562c3695b5b Sasha Levin 2020-05-19 122 pr_err("%s Entry is freed %x %d", __func__, h, index); 9cc562c3695b5b Sasha Levin 2020-05-19 123 return false; 9cc562c3695b5b Sasha Levin 2020-05-19 124 } 9cc562c3695b5b Sasha Levin 2020-05-19 125 9cc562c3695b5b Sasha Levin 2020-05-19 126 if (t != HMGRENTRY_TYPE_FREE && t != entry->type) { 9cc562c3695b5b Sasha Levin 2020-05-19 127 pr_err("%s type mismatch %x %d %d", __func__, h, 9cc562c3695b5b Sasha Levin 2020-05-19 128 t, entry->type); 9cc562c3695b5b Sasha Levin 2020-05-19 129 return false; 9cc562c3695b5b Sasha Levin 2020-05-19 130 } 9cc562c3695b5b Sasha Levin 2020-05-19 131 9cc562c3695b5b Sasha Levin 2020-05-19 132 return true; 9cc562c3695b5b Sasha Levin 2020-05-19 133 } 9cc562c3695b5b Sasha Levin 2020-05-19 134 9cc562c3695b5b Sasha Levin 2020-05-19 135 static d3dkmt_handle build_handle(uint index, uint unique, uint instance) 9cc562c3695b5b Sasha Levin 2020-05-19 136 { 9cc562c3695b5b Sasha Levin 2020-05-19 137 uint handle_bits; 9cc562c3695b5b Sasha Levin 2020-05-19 138 9cc562c3695b5b Sasha Levin 2020-05-19 139 handle_bits = (index << HMGRHANDLE_INDEX_SHIFT) & HMGRHANDLE_INDEX_MASK; 9cc562c3695b5b Sasha Levin 2020-05-19 140 handle_bits |= (unique << HMGRHANDLE_UNIQUE_SHIFT) & 9cc562c3695b5b Sasha Levin 2020-05-19 141 HMGRHANDLE_UNIQUE_MASK; 9cc562c3695b5b Sasha Levin 2020-05-19 142 handle_bits |= (instance << HMGRHANDLE_INSTANCE_SHIFT) & 9cc562c3695b5b Sasha Levin 2020-05-19 143 HMGRHANDLE_INSTANCE_MASK; 9cc562c3695b5b Sasha Levin 2020-05-19 144 9cc562c3695b5b Sasha Levin 2020-05-19 145 return (d3dkmt_handle) handle_bits; 9cc562c3695b5b Sasha Levin 2020-05-19 146 } 9cc562c3695b5b Sasha Levin 2020-05-19 147 9cc562c3695b5b Sasha Levin 2020-05-19 148 inline uint hmgrtable_get_used_entry_count(struct hmgrtable *table) 9cc562c3695b5b Sasha Levin 2020-05-19 149 { 9cc562c3695b5b Sasha Levin 2020-05-19 150 DXGKRNL_ASSERT(table->table_size >= table->free_count); 9cc562c3695b5b Sasha Levin 2020-05-19 151 return (table->table_size - table->free_count); 9cc562c3695b5b Sasha Levin 2020-05-19 152 } 9cc562c3695b5b Sasha Levin 2020-05-19 153 9cc562c3695b5b Sasha Levin 2020-05-19 154 bool hmgrtable_mark_destroyed(struct hmgrtable *table, d3dkmt_handle h) 9cc562c3695b5b Sasha Levin 2020-05-19 155 { 9cc562c3695b5b Sasha Levin 2020-05-19 156 if (!is_handle_valid(table, h, false, HMGRENTRY_TYPE_FREE)) 9cc562c3695b5b Sasha Levin 2020-05-19 157 return false; 9cc562c3695b5b Sasha Levin 2020-05-19 158 9cc562c3695b5b Sasha Levin 2020-05-19 159 table->entry_table[get_index(h)].destroyed = true; 9cc562c3695b5b Sasha Levin 2020-05-19 160 return true; 9cc562c3695b5b Sasha Levin 2020-05-19 161 } 9cc562c3695b5b Sasha Levin 2020-05-19 162 9cc562c3695b5b Sasha Levin 2020-05-19 163 bool hmgrtable_unmark_destroyed(struct hmgrtable *table, d3dkmt_handle h) 9cc562c3695b5b Sasha Levin 2020-05-19 164 { 9cc562c3695b5b Sasha Levin 2020-05-19 165 if (!is_handle_valid(table, h, true, HMGRENTRY_TYPE_FREE)) 9cc562c3695b5b Sasha Levin 2020-05-19 166 return true; 9cc562c3695b5b Sasha Levin 2020-05-19 167 9cc562c3695b5b Sasha Levin 2020-05-19 168 DXGKRNL_ASSERT(table->entry_table[get_index(h)].destroyed); 9cc562c3695b5b Sasha Levin 2020-05-19 169 table->entry_table[get_index(h)].destroyed = 0; 9cc562c3695b5b Sasha Levin 2020-05-19 170 return true; 9cc562c3695b5b Sasha Levin 2020-05-19 171 } 9cc562c3695b5b Sasha Levin 2020-05-19 172 9cc562c3695b5b Sasha Levin 2020-05-19 173 static inline bool is_empty(struct hmgrtable *table) 9cc562c3695b5b Sasha Levin 2020-05-19 174 { 9cc562c3695b5b Sasha Levin 2020-05-19 175 return (table->free_count == table->table_size); 9cc562c3695b5b Sasha Levin 2020-05-19 176 } 9cc562c3695b5b Sasha Levin 2020-05-19 177 9cc562c3695b5b Sasha Levin 2020-05-19 @178 void print_status(struct hmgrtable *table) 9cc562c3695b5b Sasha Levin 2020-05-19 179 { 9cc562c3695b5b Sasha Levin 2020-05-19 180 int i; 9cc562c3695b5b Sasha Levin 2020-05-19 181 9cc562c3695b5b Sasha Levin 2020-05-19 182 TRACE_DEBUG(1, "hmgrtable head, tail %p %d %d\n", 9cc562c3695b5b Sasha Levin 2020-05-19 183 table, table->free_handle_list_head, 9cc562c3695b5b Sasha Levin 2020-05-19 184 table->free_handle_list_tail); 9cc562c3695b5b Sasha Levin 2020-05-19 185 if (table->entry_table == NULL) 9cc562c3695b5b Sasha Levin 2020-05-19 186 return; 9cc562c3695b5b Sasha Levin 2020-05-19 187 for (i = 0; i < 3; i++) { 9cc562c3695b5b Sasha Levin 2020-05-19 188 if (table->entry_table[i].type != HMGRENTRY_TYPE_FREE) 9cc562c3695b5b Sasha Levin 2020-05-19 189 TRACE_DEBUG(1, "hmgrtable entry %p %d %p\n", 9cc562c3695b5b Sasha Levin 2020-05-19 190 table, i, table->entry_table[i].object); 9cc562c3695b5b Sasha Levin 2020-05-19 191 else 9cc562c3695b5b Sasha Levin 2020-05-19 192 TRACE_DEBUG(1, "hmgrtable entry %p %d %d %d\n", 9cc562c3695b5b Sasha Levin 2020-05-19 193 table, i, 9cc562c3695b5b Sasha Levin 2020-05-19 194 table->entry_table[i].next_free_index, 9cc562c3695b5b Sasha Levin 2020-05-19 195 table->entry_table[i].prev_free_index); 9cc562c3695b5b Sasha Levin 2020-05-19 196 } 9cc562c3695b5b Sasha Levin 2020-05-19 197 } 9cc562c3695b5b Sasha Levin 2020-05-19 198 :::::: The code at line 91 was first introduced by commit :::::: 9cc562c3695b5b44c0c931c76bdc24e8c4f33587 gpu: dxgkrnl: core code :::::: TO: Sasha Levin <sashal(a)kernel.org&gt; :::::: CC: 0day robot <lkp(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org