tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 91e71d606356e50f238d7a87aacdee4abc427f07 commit: 212fe932ee57ec4a0f41bdc42b58c64fe3062147 [1948/2656] minmax.h: simplify the variants of clamp() config: s390-defconfig (https://download.01.org/0day-ci/archive/20241212/202412120322.3GfVe3vF-lkp@xxxxxxxxx/config) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241212/202412120322.3GfVe3vF-lkp@xxxxxxxxx/reproduce) 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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202412120322.3GfVe3vF-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> block/blk-iocost.c:1101:11: error: call to __compiletime_assert_560 declared with 'error' attribute: clamp() low limit 1 greater than high limit active inuse = clamp_t(u32, inuse, 1, active); ^ include/linux/minmax.h:220:36: note: expanded from macro 'clamp_t' #define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi) ^ include/linux/minmax.h:197:2: note: expanded from macro '__careful_clamp' __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_)) ^ include/linux/minmax.h:190:2: note: expanded from macro '__clamp_once' BUILD_BUG_ON_MSG(statically_true(ulo > uhi), \ ^ note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:530:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:523:4: note: expanded from macro '__compiletime_assert' prefix ## suffix(); \ ^ <scratch space>:24:1: note: expanded from here __compiletime_assert_560 ^ >> block/blk-iocost.c:1101:11: error: call to __compiletime_assert_560 declared with 'error' attribute: clamp() low limit 1 greater than high limit active include/linux/minmax.h:220:36: note: expanded from macro 'clamp_t' #define clamp_t(type, val, lo, hi) __careful_clamp(type, val, lo, hi) ^ include/linux/minmax.h:197:2: note: expanded from macro '__careful_clamp' __clamp_once(type, val, lo, hi, __UNIQUE_ID(v_), __UNIQUE_ID(l_), __UNIQUE_ID(h_)) ^ include/linux/minmax.h:190:2: note: expanded from macro '__clamp_once' BUILD_BUG_ON_MSG(statically_true(ulo > uhi), \ ^ note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:530:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:523:4: note: expanded from macro '__compiletime_assert' prefix ## suffix(); \ ^ <scratch space>:24:1: note: expanded from here __compiletime_assert_560 ^ 2 errors generated. vim +/error +1101 block/blk-iocost.c 7caa47151ab2e64 Tejun Heo 2019-08-28 1078 7caa47151ab2e64 Tejun Heo 2019-08-28 1079 /* 7caa47151ab2e64 Tejun Heo 2019-08-28 1080 * Update @iocg's `active` and `inuse` to @active and @inuse, update level b0853ab4a238c54 Tejun Heo 2020-09-01 1081 * weight sums and propagate upwards accordingly. If @save, the current margin b0853ab4a238c54 Tejun Heo 2020-09-01 1082 * is saved to be used as reference for later inuse in-period adjustments. 7caa47151ab2e64 Tejun Heo 2019-08-28 1083 */ b0853ab4a238c54 Tejun Heo 2020-09-01 1084 static void __propagate_weights(struct ioc_gq *iocg, u32 active, u32 inuse, b0853ab4a238c54 Tejun Heo 2020-09-01 1085 bool save, struct ioc_now *now) 7caa47151ab2e64 Tejun Heo 2019-08-28 1086 { 7caa47151ab2e64 Tejun Heo 2019-08-28 1087 struct ioc *ioc = iocg->ioc; 7caa47151ab2e64 Tejun Heo 2019-08-28 1088 int lvl; 7caa47151ab2e64 Tejun Heo 2019-08-28 1089 7caa47151ab2e64 Tejun Heo 2019-08-28 1090 lockdep_assert_held(&ioc->lock); 7caa47151ab2e64 Tejun Heo 2019-08-28 1091 e9f4eee9a0023ba Tejun Heo 2021-05-11 1092 /* e9f4eee9a0023ba Tejun Heo 2021-05-11 1093 * For an active leaf node, its inuse shouldn't be zero or exceed e9f4eee9a0023ba Tejun Heo 2021-05-11 1094 * @active. An active internal node's inuse is solely determined by the e9f4eee9a0023ba Tejun Heo 2021-05-11 1095 * inuse to active ratio of its children regardless of @inuse. e9f4eee9a0023ba Tejun Heo 2021-05-11 1096 */ e9f4eee9a0023ba Tejun Heo 2021-05-11 1097 if (list_empty(&iocg->active_list) && iocg->child_active_sum) { e9f4eee9a0023ba Tejun Heo 2021-05-11 1098 inuse = DIV64_U64_ROUND_UP(active * iocg->child_inuse_sum, e9f4eee9a0023ba Tejun Heo 2021-05-11 1099 iocg->child_active_sum); e9f4eee9a0023ba Tejun Heo 2021-05-11 1100 } else { db84a72af6be422 Tejun Heo 2020-09-01 @1101 inuse = clamp_t(u32, inuse, 1, active); e9f4eee9a0023ba Tejun Heo 2021-05-11 1102 } db84a72af6be422 Tejun Heo 2020-09-01 1103 b0853ab4a238c54 Tejun Heo 2020-09-01 1104 iocg->last_inuse = iocg->inuse; b0853ab4a238c54 Tejun Heo 2020-09-01 1105 if (save) b0853ab4a238c54 Tejun Heo 2020-09-01 1106 iocg->saved_margin = now->vnow - atomic64_read(&iocg->vtime); b0853ab4a238c54 Tejun Heo 2020-09-01 1107 db84a72af6be422 Tejun Heo 2020-09-01 1108 if (active == iocg->active && inuse == iocg->inuse) db84a72af6be422 Tejun Heo 2020-09-01 1109 return; 7caa47151ab2e64 Tejun Heo 2019-08-28 1110 7caa47151ab2e64 Tejun Heo 2019-08-28 1111 for (lvl = iocg->level - 1; lvl >= 0; lvl--) { 7caa47151ab2e64 Tejun Heo 2019-08-28 1112 struct ioc_gq *parent = iocg->ancestors[lvl]; 7caa47151ab2e64 Tejun Heo 2019-08-28 1113 struct ioc_gq *child = iocg->ancestors[lvl + 1]; 7caa47151ab2e64 Tejun Heo 2019-08-28 1114 u32 parent_active = 0, parent_inuse = 0; 7caa47151ab2e64 Tejun Heo 2019-08-28 1115 7caa47151ab2e64 Tejun Heo 2019-08-28 1116 /* update the level sums */ 7caa47151ab2e64 Tejun Heo 2019-08-28 1117 parent->child_active_sum += (s32)(active - child->active); 7caa47151ab2e64 Tejun Heo 2019-08-28 1118 parent->child_inuse_sum += (s32)(inuse - child->inuse); e9f4eee9a0023ba Tejun Heo 2021-05-11 1119 /* apply the updates */ 7caa47151ab2e64 Tejun Heo 2019-08-28 1120 child->active = active; 7caa47151ab2e64 Tejun Heo 2019-08-28 1121 child->inuse = inuse; 7caa47151ab2e64 Tejun Heo 2019-08-28 1122 7caa47151ab2e64 Tejun Heo 2019-08-28 1123 /* 7caa47151ab2e64 Tejun Heo 2019-08-28 1124 * The delta between inuse and active sums indicates that 5ba1add216fe822 Baolin Wang 2020-11-26 1125 * much of weight is being given away. Parent's inuse 7caa47151ab2e64 Tejun Heo 2019-08-28 1126 * and active should reflect the ratio. 7caa47151ab2e64 Tejun Heo 2019-08-28 1127 */ 7caa47151ab2e64 Tejun Heo 2019-08-28 1128 if (parent->child_active_sum) { 7caa47151ab2e64 Tejun Heo 2019-08-28 1129 parent_active = parent->weight; 7caa47151ab2e64 Tejun Heo 2019-08-28 1130 parent_inuse = DIV64_U64_ROUND_UP( 7caa47151ab2e64 Tejun Heo 2019-08-28 1131 parent_active * parent->child_inuse_sum, 7caa47151ab2e64 Tejun Heo 2019-08-28 1132 parent->child_active_sum); 7caa47151ab2e64 Tejun Heo 2019-08-28 1133 } 7caa47151ab2e64 Tejun Heo 2019-08-28 1134 7caa47151ab2e64 Tejun Heo 2019-08-28 1135 /* do we need to keep walking up? */ 7caa47151ab2e64 Tejun Heo 2019-08-28 1136 if (parent_active == parent->active && 7caa47151ab2e64 Tejun Heo 2019-08-28 1137 parent_inuse == parent->inuse) 7caa47151ab2e64 Tejun Heo 2019-08-28 1138 break; 7caa47151ab2e64 Tejun Heo 2019-08-28 1139 7caa47151ab2e64 Tejun Heo 2019-08-28 1140 active = parent_active; 7caa47151ab2e64 Tejun Heo 2019-08-28 1141 inuse = parent_inuse; 7caa47151ab2e64 Tejun Heo 2019-08-28 1142 } 7caa47151ab2e64 Tejun Heo 2019-08-28 1143 7caa47151ab2e64 Tejun Heo 2019-08-28 1144 ioc->weights_updated = true; 7caa47151ab2e64 Tejun Heo 2019-08-28 1145 } 7caa47151ab2e64 Tejun Heo 2019-08-28 1146 :::::: The code at line 1101 was first introduced by commit :::::: db84a72af6be422abf2089a5896293590dda5066 blk-iocost: clamp inuse and skip noops in __propagate_weights() :::::: TO: Tejun Heo <tj@xxxxxxxxxx> :::::: CC: Jens Axboe <axboe@xxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
