CC: kbuild-all(a)lists.01.org TO: Jim Cromie Hi Jim, First bad commit (maybe != root cause): tree: https://github.com/jimc/linux.git dd-drm-next head: 01079d8e6cc5d5209114228901f6c97a046f5d86 commit: ed4425a17de1eb5638703d40ed1d002b28963687 [13/18] drm_print: add choice to use dynamic debug in drm-debug :::::: branch date: 3 hours ago :::::: commit date: 2 days ago config: x86_64-randconfig-c007-20211009 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 30caca39f401ae17927439c0a0bd6d1b1916dd6a) 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 # https://github.com/jimc/linux/commit/ed4425a17de1eb5638703d40ed1d002b28963687 git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-next git checkout ed4425a17de1eb5638703d40ed1d002b28963687 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot clang-analyzer warnings: (new ones prefixed by >>) std = "secamDK"; ^ ~~~~~~~~~ drivers/media/tuners/si2157.c:593:4: note: Value stored to 'std' is never read std = "secamDK"; ^ ~~~~~~~~~ drivers/media/tuners/si2157.c:597:3: warning: Value stored to 'std' is never read [clang-analyzer-deadcode.DeadStores] std = "secamL"; ^ ~~~~~~~~ drivers/media/tuners/si2157.c:597:3: note: Value stored to 'std' is never read std = "secamL"; ^ ~~~~~~~~ drivers/media/tuners/si2157.c:603:3: warning: Value stored to 'std' is never read [clang-analyzer-deadcode.DeadStores] std = "secamL'"; ^ ~~~~~~~~~ drivers/media/tuners/si2157.c:603:3: note: Value stored to 'std' is never read std = "secamL'"; ^ ~~~~~~~~~ drivers/media/tuners/si2157.c:609:3: warning: Value stored to 'std' is never read [clang-analyzer-deadcode.DeadStores] std = "unknown"; ^ ~~~~~~~~~ drivers/media/tuners/si2157.c:609:3: note: Value stored to 'std' is never read std = "unknown"; ^ ~~~~~~~~~ Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. arch/x86/include/asm/paravirt.h:97:2: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign] PVOP_VCALL1(mmu.exit_mmap, mm); ^ arch/x86/include/asm/paravirt_types.h:530:2: note: expanded from macro 'PVOP_VCALL1' __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1)) ^ arch/x86/include/asm/paravirt_types.h:491:8: note: expanded from macro '__PVOP_VCALL' (void)____PVOP_CALL(, op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \ ^ arch/x86/include/asm/paravirt_types.h:446:3: note: expanded from macro '____PVOP_CALL' PVOP_CALL_ARGS; \ ^ arch/x86/include/asm/paravirt_types.h:404:16: note: expanded from macro 'PVOP_CALL_ARGS' unsigned long __edi = __edi, __esi = __esi, \ ^ mm/mmap.c:3133:6: note: Assuming the condition is false if (unlikely(mm_is_oom_victim(mm))) { ^ include/linux/compiler.h:78:22: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~ mm/mmap.c:3133:2: note: Taking false branch if (unlikely(mm_is_oom_victim(mm))) { ^ mm/mmap.c:3157:6: note: Assuming field 'locked_vm' is 0 if (mm->locked_vm) ^~~~~~~~~~~~~ mm/mmap.c:3157:2: note: Taking false branch if (mm->locked_vm) ^ mm/mmap.c:3160:2: note: Calling 'arch_exit_mmap' arch_exit_mmap(mm); ^~~~~~~~~~~~~~~~~~ arch/x86/include/asm/mmu_context.h:176:2: note: Calling 'paravirt_arch_exit_mmap' paravirt_arch_exit_mmap(mm); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/paravirt.h:97:2: note: Assigned value is garbage or undefined PVOP_VCALL1(mmu.exit_mmap, mm); ^ arch/x86/include/asm/paravirt_types.h:530:2: note: expanded from macro 'PVOP_VCALL1' __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/paravirt_types.h:491:8: note: expanded from macro '__PVOP_VCALL' (void)____PVOP_CALL(, op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/paravirt_types.h:446:3: note: expanded from macro '____PVOP_CALL' PVOP_CALL_ARGS; \ ^~~~~~~~~~~~~~ arch/x86/include/asm/paravirt_types.h:404:16: note: expanded from macro 'PVOP_CALL_ARGS' unsigned long __edi = __edi, __esi = __esi, \ ^ ~~~~~ mm/mmap.c:1978:2: warning: Value stored to 'gap_end' is never read [clang-analyzer-deadcode.DeadStores] gap_end = ULONG_MAX; /* Only for VM_BUG_ON below */ ^ mm/mmap.c:1978:2: note: Value stored to 'gap_end' is never read mm/mmap.c:3246:3: warning: Value stored to 'faulted_in_anon_vma' is never read [clang-analyzer-deadcode.DeadStores] faulted_in_anon_vma = false; ^ ~~~~~ mm/mmap.c:3246:3: note: Value stored to 'faulted_in_anon_vma' is never read faulted_in_anon_vma = false; ^ ~~~~~ mm/mmap.c:3688:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = percpu_counter_init(&vm_committed_as, 0, GFP_KERNEL); ^ mm/mmap.c:3688:2: note: Value stored to 'ret' is never read Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 11 warnings generated. >> drivers/gpu/drm/i2c/tda998x_drv.c:798:3: warning: Value stored to 'flag0' is never read [clang-analyzer-deadcode.DeadStores] flag0 = reg_read(priv, REG_INT_FLAGS_0); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i2c/tda998x_drv.c:798:3: note: Value stored to 'flag0' is never read flag0 = reg_read(priv, REG_INT_FLAGS_0); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/i2c/tda998x_drv.c:799:3: warning: Value stored to 'flag1' is never read [clang-analyzer-deadcode.DeadStores] flag1 = reg_read(priv, REG_INT_FLAGS_1); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i2c/tda998x_drv.c:799:3: note: Value stored to 'flag1' is never read flag1 = reg_read(priv, REG_INT_FLAGS_1); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 9 warnings (9 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c:366:3: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores] err = PTR_ERR(kingdisplay->enable_gpio); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c:366:3: note: Value stored to 'err' is never read err = PTR_ERR(kingdisplay->enable_gpio); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 11 warnings generated. Suppressed 11 warnings (11 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 1 warning generated. Suppressed 1 warnings (1 with check filters). 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. lib/glob.c:48:32: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign] char const *back_pat = NULL, *back_str = back_str; ^ ~~~~~~~~ lib/glob.c:48:32: note: Assigned value is garbage or undefined char const *back_pat = NULL, *back_str = back_str; ^ ~~~~~~~~ Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 20 warnings generated. drivers/clk/clk.c:1951:3: warning: Value stored to 'best_parent_rate' is never read [clang-analyzer-deadcode.DeadStores] best_parent_rate = parent->rate; ^ ~~~~~~~~~~~~ -- 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 13 warnings generated. mm/memory_hotplug.c:1909:3: warning: Value stored to 'reason' is never read [clang-analyzer-deadcode.DeadStores] reason = "memory holes"; ^ ~~~~~~~~~~~~~~ mm/memory_hotplug.c:1909:3: note: Value stored to 'reason' is never read reason = "memory holes"; ^ ~~~~~~~~~~~~~~ mm/memory_hotplug.c:1918:3: warning: Value stored to 'reason' is never read [clang-analyzer-deadcode.DeadStores] reason = "multizone range"; ^ ~~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1918:3: note: Value stored to 'reason' is never read reason = "multizone range"; ^ ~~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1935:3: warning: Value stored to 'reason' is never read [clang-analyzer-deadcode.DeadStores] reason = "failure to isolate range"; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1935:3: note: Value stored to 'reason' is never read reason = "failure to isolate range"; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1946:3: warning: Value stored to 'reason' is never read [clang-analyzer-deadcode.DeadStores] reason = "notifier failure"; ^ ~~~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1946:3: note: Value stored to 'reason' is never read reason = "notifier failure"; ^ ~~~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1955:5: warning: Value stored to 'reason' is never read [clang-analyzer-deadcode.DeadStores] reason = "signal backoff"; ^ ~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1955:5: note: Value stored to 'reason' is never read reason = "signal backoff"; ^ ~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1972:4: warning: Value stored to 'reason' is never read [clang-analyzer-deadcode.DeadStores] reason = "unmovable page"; ^ ~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1972:4: note: Value stored to 'reason' is never read reason = "unmovable page"; ^ ~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1983:4: warning: Value stored to 'reason' is never read [clang-analyzer-deadcode.DeadStores] reason = "failure to dissolve huge pages"; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mm/memory_hotplug.c:1983:4: note: Value stored to 'reason' is never read reason = "failure to dissolve huge pages"; ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch] if (!(dflow->en_scaling || dflow->en_img_enhancement)) ^ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1164:8: note: Calling 'komeda_splitter_validate' err = komeda_splitter_validate(pipe->splitter, conn_st, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:572:6: note: Assuming 'splitter' is non-null if (!splitter) { ^~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:572:2: note: Taking false branch if (!splitter) { ^ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:577:2: note: Taking false branch if (!in_range(&splitter->hsize, dflow->in_w)) { ^ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:583:2: note: Taking false branch if (!in_range(&splitter->vsize, dflow->in_h)) { ^ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:592:2: note: Taking true branch if (IS_ERR(c_st)) ^ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:593:3: note: Returning without writing to 'l_output->en_scaling' return PTR_ERR(c_st); ^ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1164:8: note: Returning from 'komeda_splitter_validate' err = komeda_splitter_validate(pipe->splitter, conn_st, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:6: note: Assuming 'err' is 0 if (err) ^~~ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1166:2: note: Taking false branch if (err) ^ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:1168:8: note: Calling 'komeda_scaler_validate' err = komeda_scaler_validate(conn, kcrtc_st, &l_dflow); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: note: Branch condition evaluates to a garbage value if (!(dflow->en_scaling || dflow->en_img_enhancement)) ^~~~~~~~~~~~~~~~~ Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 11 warnings generated. >> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: warning: Value stored to 'a' during its initialization is never read [clang-analyzer-deadcode.DeadStores] struct drm_plane *a = node->base.plane; ^ ~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: note: Value stored to 'a' during its initialization is never read struct drm_plane *a = node->base.plane; ^ ~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: warning: Value stored to 'b' during its initialization is never read [clang-analyzer-deadcode.DeadStores] struct drm_plane *b = new->base.plane; ^ ~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: note: Value stored to 'b' during its initialization is never read struct drm_plane *b = new->base.plane; ^ ~~~~~~~~~~~~~~~ include/linux/list.h:73:2: warning: Dereference of null pointer [clang-analyzer-core.NullDereference] WRITE_ONCE(prev->next, new); ^ include/asm-generic/rwonce.h:61:2: note: expanded from macro 'WRITE_ONCE' __WRITE_ONCE(x, val); \ ^ include/asm-generic/rwonce.h:55:30: note: expanded from macro '__WRITE_ONCE' *(volatile typeof(x) *)&(x) = (val); \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:6: note: Assuming 'err' is 0 if (err) ^~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:2: note: Taking false branch if (err) ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Assuming 'i' is < field 'num_crtc' for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) { ^ include/drm/drm_atomic.h:846:7: note: expanded from macro 'for_each_new_crtc_in_state' (__i) < (__state)->dev->mode_config.num_crtc; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Loop condition is true. Entering loop body for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) { ^ include/drm/drm_atomic.h:845:2: note: expanded from macro 'for_each_new_crtc_in_state' for ((__i) = 0; \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Assuming field 'ptr' is non-null for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) { ^ include/drm/drm_atomic.h:848:16: note: expanded from macro 'for_each_new_crtc_in_state' for_each_if ((__state)->crtcs[__i].ptr && \ ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/drm/drm_util.h:63:38: note: expanded from macro 'for_each_if' #define for_each_if(condition) if (!(condition)) {} else ^~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Left side of '&&' is true for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) { ^ include/drm/drm_atomic.h:848:16: note: expanded from macro 'for_each_new_crtc_in_state' for_each_if ((__state)->crtcs[__i].ptr && \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Taking false branch for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) { ^ include/drm/drm_atomic.h:848:3: note: expanded from macro 'for_each_new_crtc_in_state' for_each_if ((__state)->crtcs[__i].ptr && \ ^ include/drm/drm_util.h:63:32: note: expanded from macro 'for_each_if' #define for_each_if(condition) if (!(condition)) {} else ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:214:7: note: Assuming 'err' is 0 if (err) ^~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:214:3: note: Taking false branch if (err) ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:217:9: note: Calling 'komeda_crtc_normalize_zpos' err = komeda_crtc_normalize_zpos(crtc, new_crtc_st); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Left side of '&&' is false struct komeda_crtc *kcrtc = to_kcrtc(crtc); ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc' #define to_kcrtc(p) container_of(p, struct komeda_crtc, base) ^ include/linux/kernel.h:495:61: note: expanded from macro 'container_of' BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Taking false branch struct komeda_crtc *kcrtc = to_kcrtc(crtc); ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc' #define to_kcrtc(p) container_of(p, struct komeda_crtc, base) ^ include/linux/kernel.h:495:2: note: expanded from macro 'container_of' BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ ^ include/linux/build_bug.h:39:37: note: expanded from macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^ include/linux/compiler_types.h:322:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler_types.h:310:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:302:3: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Loop condition is false. Exiting loop struct komeda_crtc *kcrtc = to_kcrtc(crtc); ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded from macro 'to_kcrtc' #define to_kcrtc(p) container_of(p, struct komeda_crtc, base) vim +/flag0 +798 drivers/gpu/drm/i2c/tda998x_drv.c 6833d26ef823b2 Jean-Francois Moine 2014-11-29 784 12473b7d8e6074 Jean-Francois Moine 2014-01-25 785 /* 12473b7d8e6074 Jean-Francois Moine 2014-01-25 786 * only 2 interrupts may occur: screen plug/unplug and EDID read 12473b7d8e6074 Jean-Francois Moine 2014-01-25 787 */ 12473b7d8e6074 Jean-Francois Moine 2014-01-25 788 static irqreturn_t tda998x_irq_thread(int irq, void *data) 12473b7d8e6074 Jean-Francois Moine 2014-01-25 789 { 12473b7d8e6074 Jean-Francois Moine 2014-01-25 790 struct tda998x_priv *priv = data; 12473b7d8e6074 Jean-Francois Moine 2014-01-25 791 u8 sta, cec, lvl, flag0, flag1, flag2; f84a97d4804a09 Russell King 2015-06-06 792 bool handled = false; 12473b7d8e6074 Jean-Francois Moine 2014-01-25 793 12473b7d8e6074 Jean-Francois Moine 2014-01-25 794 sta = cec_read(priv, REG_CEC_INTSTATUS); ae81553c30ef86 Russell King 2016-11-03 795 if (sta & CEC_INTSTATUS_HDMI) { 12473b7d8e6074 Jean-Francois Moine 2014-01-25 796 cec = cec_read(priv, REG_CEC_RXSHPDINT); 12473b7d8e6074 Jean-Francois Moine 2014-01-25 797 lvl = cec_read(priv, REG_CEC_RXSHPDLEV); 12473b7d8e6074 Jean-Francois Moine 2014-01-25 @798 flag0 = reg_read(priv, REG_INT_FLAGS_0); 12473b7d8e6074 Jean-Francois Moine 2014-01-25 @799 flag1 = reg_read(priv, REG_INT_FLAGS_1); 12473b7d8e6074 Jean-Francois Moine 2014-01-25 800 flag2 = reg_read(priv, REG_INT_FLAGS_2); 12473b7d8e6074 Jean-Francois Moine 2014-01-25 801 DRM_DEBUG_DRIVER( 12473b7d8e6074 Jean-Francois Moine 2014-01-25 802 "tda irq sta %02x cec %02x lvl %02x f0 %02x f1 %02x f2 %02x\n", 12473b7d8e6074 Jean-Francois Moine 2014-01-25 803 sta, cec, lvl, flag0, flag1, flag2); ec5d3e83d332ac Russell King 2015-06-06 804 ec5d3e83d332ac Russell King 2015-06-06 805 if (cec & CEC_RXSHPDINT_HPD) { 7e8675f000bc7e Russell King 2016-10-05 806 if (lvl & CEC_RXSHPDLEV_HPD) { 0fc6f44d9683c6 Russell King 2015-06-06 807 tda998x_edid_delay_start(priv); 7e8675f000bc7e Russell King 2016-10-05 808 } else { 0fc6f44d9683c6 Russell King 2015-06-06 809 schedule_work(&priv->detect_work); ece485d550dce2 Dariusz Marcinkiewicz 2019-10-17 810 cec_notifier_phys_addr_invalidate( ece485d550dce2 Dariusz Marcinkiewicz 2019-10-17 811 priv->cec_notify); 7e8675f000bc7e Russell King 2016-10-05 812 } 0fc6f44d9683c6 Russell King 2015-06-06 813 f84a97d4804a09 Russell King 2015-06-06 814 handled = true; 12473b7d8e6074 Jean-Francois Moine 2014-01-25 815 } ec5d3e83d332ac Russell King 2015-06-06 816 ec5d3e83d332ac Russell King 2015-06-06 817 if ((flag2 & INT_FLAGS_2_EDID_BLK_RD) && priv->wq_edid_wait) { ec5d3e83d332ac Russell King 2015-06-06 818 priv->wq_edid_wait = 0; ec5d3e83d332ac Russell King 2015-06-06 819 wake_up(&priv->wq_edid); ec5d3e83d332ac Russell King 2015-06-06 820 handled = true; ec5d3e83d332ac Russell King 2015-06-06 821 } ae81553c30ef86 Russell King 2016-11-03 822 } ec5d3e83d332ac Russell King 2015-06-06 823 f84a97d4804a09 Russell King 2015-06-06 824 return IRQ_RETVAL(handled); 12473b7d8e6074 Jean-Francois Moine 2014-01-25 825 } 12473b7d8e6074 Jean-Francois Moine 2014-01-25 826 :::::: The code at line 798 was first introduced by commit :::::: 12473b7d8e6074c7d4c2816afa6027354ce9a502 drm/i2c: tda998x: use irq for connection status and EDID read :::::: TO: Jean-Francois Moine :::::: CC: Russell King --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org