tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 009c9aa5be652675a06d5211e1640e02bbb1c33d commit: 997acaf6b4b59c6a9c259740312a69ea549cc684 lockdep: report broken irq restoration date: 5 months ago config: powerpc-randconfig-r023-20210615 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 997acaf6b4b59c6a9c259740312a69ea549cc684 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:4: In file included from include/linux/kernel.h:11: In file included from include/linux/bitops.h:32: In file included from arch/powerpc/include/asm/bitops.h:62: arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined] #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory") ^ <built-in>:309:9: note: previous definition is here #define __lwsync __builtin_ppc_lwsync ^ static void mlxsw_sp_router_fib_event_work(struct work_struct *work) ^ 2 warnings generated. vim +/mlxsw_sp_router_fib_event_work +7071 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c d42b0965b1d4fe Yotam Gigi 2017-09-27 7070 c1b290d594a12b Jiri Pirko 2020-11-10 @7071 static void mlxsw_sp_router_fib_event_work(struct work_struct *work) c1b290d594a12b Jiri Pirko 2020-11-10 7072 { c1b290d594a12b Jiri Pirko 2020-11-10 7073 struct mlxsw_sp_router *router = container_of(work, struct mlxsw_sp_router, fib_event_work); 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7074 struct mlxsw_sp_fib_entry_op_ctx *op_ctx = router->ll_op_ctx; c1b290d594a12b Jiri Pirko 2020-11-10 7075 struct mlxsw_sp *mlxsw_sp = router->mlxsw_sp; 505cd65c66e822 Jiri Pirko 2020-11-10 7076 struct mlxsw_sp_fib_event *next_fib_event; 505cd65c66e822 Jiri Pirko 2020-11-10 7077 struct mlxsw_sp_fib_event *fib_event; 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7078 int last_family = AF_UNSPEC; c1b290d594a12b Jiri Pirko 2020-11-10 7079 LIST_HEAD(fib_event_queue); c1b290d594a12b Jiri Pirko 2020-11-10 7080 c1b290d594a12b Jiri Pirko 2020-11-10 7081 spin_lock_bh(&router->fib_event_queue_lock); c1b290d594a12b Jiri Pirko 2020-11-10 7082 list_splice_init(&router->fib_event_queue, &fib_event_queue); c1b290d594a12b Jiri Pirko 2020-11-10 7083 spin_unlock_bh(&router->fib_event_queue_lock); c1b290d594a12b Jiri Pirko 2020-11-10 7084 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7085 /* Router lock is held here to make sure per-instance 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7086 * operation context is not used in between FIB4/6 events 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7087 * processing. 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7088 */ 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7089 mutex_lock(&router->lock); 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7090 mlxsw_sp_fib_entry_op_ctx_clear(op_ctx); 505cd65c66e822 Jiri Pirko 2020-11-10 7091 list_for_each_entry_safe(fib_event, next_fib_event, 505cd65c66e822 Jiri Pirko 2020-11-10 7092 &fib_event_queue, list) { 505cd65c66e822 Jiri Pirko 2020-11-10 7093 /* Check if the next entry in the queue exists and it is 505cd65c66e822 Jiri Pirko 2020-11-10 7094 * of the same type (family and event) as the currect one. 505cd65c66e822 Jiri Pirko 2020-11-10 7095 * In that case it is permitted to do the bulking 505cd65c66e822 Jiri Pirko 2020-11-10 7096 * of multiple FIB entries to a single register write. 505cd65c66e822 Jiri Pirko 2020-11-10 7097 */ 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7098 op_ctx->bulk_ok = !list_is_last(&fib_event->list, &fib_event_queue) && 505cd65c66e822 Jiri Pirko 2020-11-10 7099 fib_event->family == next_fib_event->family && 505cd65c66e822 Jiri Pirko 2020-11-10 7100 fib_event->event == next_fib_event->event; 54ff9dbbb96f7e Jiri Pirko 2020-12-14 7101 op_ctx->event = fib_event->event; 505cd65c66e822 Jiri Pirko 2020-11-10 7102 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7103 /* In case family of this and the previous entry are different, context 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7104 * reinitialization is going to be needed now, indicate that. 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7105 * Note that since last_family is initialized to AF_UNSPEC, this is always 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7106 * going to happen for the first entry processed in the work. 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7107 */ 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7108 if (fib_event->family != last_family) 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7109 op_ctx->initialized = false; 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7110 c1b290d594a12b Jiri Pirko 2020-11-10 7111 switch (fib_event->family) { c1b290d594a12b Jiri Pirko 2020-11-10 7112 case AF_INET: 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7113 mlxsw_sp_router_fib4_event_process(mlxsw_sp, op_ctx, 2d5bd7a111ca08 Jiri Pirko 2020-11-10 7114 fib_event); c1b290d594a12b Jiri Pirko 2020-11-10 7115 break; c1b290d594a12b Jiri Pirko 2020-11-10 7116 case AF_INET6: 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7117 mlxsw_sp_router_fib6_event_process(mlxsw_sp, op_ctx, 2d5bd7a111ca08 Jiri Pirko 2020-11-10 7118 fib_event); c1b290d594a12b Jiri Pirko 2020-11-10 7119 break; c1b290d594a12b Jiri Pirko 2020-11-10 7120 case RTNL_FAMILY_IP6MR: c1b290d594a12b Jiri Pirko 2020-11-10 7121 case RTNL_FAMILY_IPMR: 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7122 /* Unlock here as inside FIBMR the lock is taken again 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7123 * under RTNL. The per-instance operation context 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7124 * is not used by FIBMR. 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7125 */ 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7126 mutex_unlock(&router->lock); c1b290d594a12b Jiri Pirko 2020-11-10 7127 mlxsw_sp_router_fibmr_event_process(mlxsw_sp, c1b290d594a12b Jiri Pirko 2020-11-10 7128 fib_event); 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7129 mutex_lock(&router->lock); c1b290d594a12b Jiri Pirko 2020-11-10 7130 break; c1b290d594a12b Jiri Pirko 2020-11-10 7131 default: c1b290d594a12b Jiri Pirko 2020-11-10 7132 WARN_ON_ONCE(1); c1b290d594a12b Jiri Pirko 2020-11-10 7133 } 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7134 last_family = fib_event->family; c1b290d594a12b Jiri Pirko 2020-11-10 7135 kfree(fib_event); c1b290d594a12b Jiri Pirko 2020-11-10 7136 cond_resched(); c1b290d594a12b Jiri Pirko 2020-11-10 7137 } ae9ce81aa726ef Jiri Pirko 2020-11-10 7138 WARN_ON_ONCE(!list_empty(&router->ll_op_ctx->fib_entry_priv_list)); 91d20d71b2f0b1 Jiri Pirko 2020-11-10 7139 mutex_unlock(&router->lock); c1b290d594a12b Jiri Pirko 2020-11-10 7140 } c1b290d594a12b Jiri Pirko 2020-11-10 7141 :::::: The code at line 7071 was first introduced by commit :::::: c1b290d594a12b4ed3b7386947162d5a061900b2 mlxsw: spectrum_router: Introduce FIB event queue instead of separate works :::::: TO: Jiri Pirko <jiri(a)nvidia.com&gt; :::::: CC: Jakub Kicinski <kuba(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org