From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============6821953147407104831==" MIME-Version: 1.0 From: kernel test robot Subject: [jimc:dd-drm-rfc 13/18] 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] Date: Tue, 25 Jan 2022 22:43:19 +0800 Message-ID: <202201252247.vq1Bm7yr-lkp@intel.com> List-Id: To: kbuild@lists.01.org --===============6821953147407104831== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable CC: kbuild-all(a)lists.01.org TO: Jim Cromie tree: https://github.com/jimc/linux.git dd-drm-rfc head: c86deb7d09199fd29665d9c68f1e70850132e49a commit: ed4425a17de1eb5638703d40ed1d002b28963687 [13/18] drm_print: add cho= ice to use dynamic debug in drm-debug :::::: branch date: 4 months ago :::::: commit date: 4 months ago config: x86_64-randconfig-c007-20211009 (https://download.01.org/0day-ci/ar= chive/20220125/202201252247.vq1Bm7yr-lkp(a)intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 30caca= 39f401ae17927439c0a0bd6d1b1916dd6a) reproduce (this is a W=3D1 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/ed4425a17de1eb5638703d40ed1d= 002b28963687 git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-rfc git checkout ed4425a17de1eb5638703d40ed1d002b28963687 # save the config file to linux build tree COMPILER_INSTALL_PATH=3D$HOME/0day COMPILER=3Dclang make.cross ARCH= =3Dx86_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 >>) 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. drivers/mfd/rohm-bd70528.c:282:2: warning: Value stored to 'ret' is neve= r read [clang-analyzer-deadcode.DeadStores] ret =3D regmap_update_bits(bd70528->chip.regmap, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/mfd/rohm-bd70528.c:282:2: note: Value stored to 'ret' is never r= ead ret =3D regmap_update_bits(bd70528->chip.regmap, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 6 warnings (6 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 8 warnings generated. drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c:514:8: warnin= g: Branch condition evaluates to a garbage value [clang-analyzer-core.unini= tialized.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 =3D 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 =3D 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 =3D 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 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 10 warnings generated. >> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: warning: Value s= tored to 'a' during its initialization is never read [clang-analyzer-deadco= de.DeadStores] struct drm_plane *a =3D node->base.plane; ^ ~~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:121:22: note: Value stor= ed to 'a' during its initialization is never read struct drm_plane *a =3D node->base.plane; ^ ~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: warning: Value s= tored to 'b' during its initialization is never read [clang-analyzer-deadco= de.DeadStores] struct drm_plane *b =3D new->base.plane; ^ ~~~~~~~~~~~~~~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:122:22: note: Value stor= ed to 'b' during its initialization is never read struct drm_plane *b =3D new->base.plane; ^ ~~~~~~~~~~~~~~~ include/linux/list.h:73:2: warning: Dereference of null pointer [clang-a= nalyzer-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_O= NCE' *(volatile typeof(x) *)&(x) =3D (val); = \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:6: note: Assuming 'e= rr' is 0 if (err) ^~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:205:2: note: Taking fals= e 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 condit= ion 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) =3D 0; = \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:212:2: note: Assuming fi= eld '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 o= f '&&' 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 fals= e 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 'e= rr' is 0 if (err) ^~~ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:214:3: note: Taking fals= e branch if (err) ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:217:9: note: Calling 'ko= meda_crtc_normalize_zpos' err =3D 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 =3D to_kcrtc(crtc); ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded f= rom 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 fal= se branch struct komeda_crtc *kcrtc =3D to_kcrtc(crtc); ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded f= rom 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 'compile= time_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COU= NTER__) ^ include/linux/compiler_types.h:310:2: note: expanded from macro '_compil= etime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:302:3: note: expanded from macro '__compi= letime_assert' if (!(condition)) \ ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.c:140:30: note: Loop condi= tion is false. Exiting loop struct komeda_crtc *kcrtc =3D to_kcrtc(crtc); ^ drivers/gpu/drm/arm/display/komeda/komeda_kms.h:131:21: note: expanded f= rom macro 'to_kcrtc' #define to_kcrtc(p) container_of(p, struct komeda_crtc, base) -- 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. drivers/gpio/gpio-xilinx.c:101:13: warning: The left expression of the c= ompound assignment is an uninitialized value. The computed value will also = be garbage [clang-analyzer-core.uninitialized.Assign] map[index] &=3D ~(0xFFFFFFFFul << offset); ^ drivers/gpio/gpio-xilinx.c:520:2: note: Calling 'xgpio_read_ch_all' xgpio_read_ch_all(chip, XGPIO_DATA_OFFSET, all); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c:133:16: note: Assuming 'bit' is <=3D 'lastbit' for (bit =3D 0; bit <=3D lastbit ; bit +=3D 32) ^~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c:133:2: note: Loop condition is true. Enterin= g loop body for (bit =3D 0; bit <=3D lastbit ; bit +=3D 32) ^ drivers/gpio/gpio-xilinx.c:134:3: note: Calling 'xgpio_read_ch' xgpio_read_ch(chip, reg, bit, a); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c:120:2: note: Calling 'xgpio_set_value32' xgpio_set_value32(a, bit, xgpio_readreg(addr)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c:98:2: note: 'index' initialized to 0 const size_t index =3D BIT_WORD(bit); ^~~~~~~~~~~~~~~~~~ drivers/gpio/gpio-xilinx.c:101:13: note: The left expression of the comp= ound assignment is an uninitialized value. The computed value will also be = garbage map[index] &=3D ~(0xFFFFFFFFul << offset); ~~~~~~~~~~ ^ Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 10 warnings generated. >> drivers/gpu/drm/i2c/tda998x_drv.c:798:3: warning: Value stored to 'flag0= ' is never read [clang-analyzer-deadcode.DeadStores] flag0 =3D reg_read(priv, REG_INT_FLAGS_0); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i2c/tda998x_drv.c:798:3: note: Value stored to 'flag0' i= s never read flag0 =3D 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 =3D reg_read(priv, REG_INT_FLAGS_1); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i2c/tda998x_drv.c:799:3: note: Value stored to 'flag1' i= s never read flag1 =3D reg_read(priv, REG_INT_FLAGS_1); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 8 warnings (8 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 6 warnings generated. Suppressed 6 warnings (6 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. Suppressed 5 warnings (5 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 5 warnings generated. drivers/input/keyboard/samsung-keypad.c:88:23: warning: The result of th= e left shift is undefined because the left operand is negative [clang-analy= zer-core.UndefinedBinaryOperatorResult] val &=3D ~(1 << col) << 8; ^ drivers/input/keyboard/samsung-keypad.c:158:3: note: Calling 'samsung_ke= ypad_scan' samsung_keypad_scan(keypad, row_state); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/input/keyboard/samsung-keypad.c:85:16: note: Assuming 'col' is <= field 'cols' for (col =3D 0; col < keypad->cols; col++) { ^~~~~~~~~~~~~~~~~~ drivers/input/keyboard/samsung-keypad.c:85:2: note: Loop condition is tr= ue. Entering loop body for (col =3D 0; col < keypad->cols; col++) { ^ drivers/input/keyboard/samsung-keypad.c:86:7: note: Assuming field 'type= ' is equal to KEYPAD_TYPE_S5PV210 if (keypad->type =3D=3D KEYPAD_TYPE_S5PV210) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/input/keyboard/samsung-keypad.c:86:3: note: Taking true branch if (keypad->type =3D=3D KEYPAD_TYPE_S5PV210) { ^ drivers/input/keyboard/samsung-keypad.c:88:23: note: The result of the l= eft shift is undefined because the left operand is negative val &=3D ~(1 << col) << 8; ~~~~~~~~~~~ ^ Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. 4 warnings generated. Suppressed 4 warnings (4 in non-user code). Use -header-filter=3D.* to display errors from all non-system headers. U= se -system-headers to display errors from system headers as well. vim +/a +121 drivers/gpu/drm/arm/display/komeda/komeda_kms.c 61f1c4a8ab7575 james qian wang (Arm Technology China 2019-01-03 96) = 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 97) stat= ic int komeda_plane_state_list_add(struct drm_plane_state *plane_st, 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 98) = struct list_head *zorder_list) 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 99) { 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 100) str= uct komeda_plane_state *new =3D to_kplane_st(plane_st); 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 101) str= uct komeda_plane_state *node, *last; 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 102) = 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 103) las= t =3D list_empty(zorder_list) ? 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 104) = NULL : list_last_entry(zorder_list, typeof(*last), zlist_node); 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 105) = 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 106) /* = Considering the list sequence is zpos increasing, so if list is empty 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 107) * = or the zpos of new node bigger than the last node in list, no need 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 108) * = loop and just insert the new one to the tail of the list. 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 109) */ 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 110) if = (!last || (new->base.zpos > last->base.zpos)) { 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 111) li= st_add_tail(&new->zlist_node, zorder_list); 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 112) re= turn 0; 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 113) } 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 114) = 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 115) /* = Build the list by zpos increasing */ 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 116) lis= t_for_each_entry(node, zorder_list, zlist_node) { 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 117) if= (new->base.zpos < node->base.zpos) { 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 118) l= ist_add_tail(&new->zlist_node, &node->zlist_node); 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 119) b= reak; 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 120) } = else if (node->base.zpos =3D=3D new->base.zpos) { 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 @121) s= truct drm_plane *a =3D node->base.plane; 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 @122) s= truct drm_plane *b =3D new->base.plane; 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 123) = 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 124) /= * Komeda doesn't support setting a same zpos for 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 125) = * different planes. 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 126) = */ 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 127) D= RM_DEBUG_ATOMIC("PLANE: %s and PLANE: %s are configured same zpos: %d.\n", 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 128) = a->name, b->name, node->base.zpos); 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 129) r= eturn -EINVAL; 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 130) } 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 131) } 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 132) = 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 133) ret= urn 0; 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 134) } 109bd7d5f4c2db Lowry Li (Arm Technology China 2019-05-20 135) = :::::: The code at line 121 was first introduced by commit :::::: 109bd7d5f4c2db66541272e5a41aeabd6cfeef95 drm/komeda: Adds zorder sup= port :::::: TO: Lowry Li (Arm Technology China) :::::: CC: Liviu Dudau --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org --===============6821953147407104831==--