On Wed, 8 Nov 2023 13:55:21 +0800 kernel test robot <lkp@xxxxxxxxx> wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 305230142ae0637213bf6e04f6d9f10bbcb74af8 > commit: c0a581d7126c0bbc96163276f585fd7b4e4d8d0e tracing: Disable interrupt or preemption before acquiring arch_spinlock_t > date: 1 year, 1 month ago > config: loongarch-randconfig-r123-20231107 (https://download.01.org/0day-ci/archive/20231108/202311081340.3k72KKdg-lkp@xxxxxxxxx/config) > compiler: loongarch64-linux-gcc (GCC) 13.2.0 > reproduce: (https://download.01.org/0day-ci/archive/20231108/202311081340.3k72KKdg-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/202311081340.3k72KKdg-lkp@xxxxxxxxx/ > > sparse warnings: (new ones prefixed by >>) > kernel/trace/trace.c:406:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct trace_export **list @@ got struct trace_export [noderef] __rcu ** @@ > kernel/trace/trace.c:406:28: sparse: expected struct trace_export **list > kernel/trace/trace.c:406:28: sparse: got struct trace_export [noderef] __rcu ** > kernel/trace/trace.c:420:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct trace_export **list @@ got struct trace_export [noderef] __rcu ** @@ > kernel/trace/trace.c:420:33: sparse: expected struct trace_export **list > kernel/trace/trace.c:420:33: sparse: got struct trace_export [noderef] __rcu ** > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@ > kernel/trace/trace.c:2430:9: sparse: expected void *ptr > kernel/trace/trace.c:2430:9: sparse: got unsigned int [noderef] __percpu * > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@ > kernel/trace/trace.c:2430:9: sparse: expected void *ptr > kernel/trace/trace.c:2430:9: sparse: got unsigned int [noderef] __percpu * > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@ > kernel/trace/trace.c:2430:9: sparse: expected void *ptr > kernel/trace/trace.c:2430:9: sparse: got unsigned int [noderef] __percpu * > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got unsigned int [noderef] __percpu * @@ > kernel/trace/trace.c:2430:9: sparse: expected void *ptr > kernel/trace/trace.c:2430:9: sparse: got unsigned int [noderef] __percpu * > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@ > kernel/trace/trace.c:2430:9: sparse: expected void *ptr > kernel/trace/trace.c:2430:9: sparse: got int [noderef] __percpu * > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@ > kernel/trace/trace.c:2430:9: sparse: expected void *ptr > kernel/trace/trace.c:2430:9: sparse: got int [noderef] __percpu * > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@ > kernel/trace/trace.c:2430:9: sparse: expected void *ptr > kernel/trace/trace.c:2430:9: sparse: got int [noderef] __percpu * > >> kernel/trace/trace.c:2430:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *ptr @@ got int [noderef] __percpu * @@ > > vim +2430 kernel/trace/trace.c > > 2410 > 2411 static int trace_save_cmdline(struct task_struct *tsk) > 2412 { > 2413 unsigned tpid, idx; > 2414 > 2415 /* treat recording of idle task as a success */ > 2416 if (!tsk->pid) > 2417 return 1; > 2418 > 2419 tpid = tsk->pid & (PID_MAX_DEFAULT - 1); > 2420 > 2421 /* > 2422 * It's not the end of the world if we don't get > 2423 * the lock, but we also don't want to spin > 2424 * nor do we want to disable interrupts, > 2425 * so if we miss here, then better luck next time. > 2426 * > 2427 * This is called within the scheduler and wake up, so interrupts > 2428 * had better been disabled and run queue lock been held. > 2429 */ > > 2430 lockdep_assert_preemption_disabled(); The above is a generic lockdep utility. Sounds to me that this is a bug in the loongarch code that doesn't handle this properly. -- Steve > 2431 if (!arch_spin_trylock(&trace_cmdline_lock)) > 2432 return 0; > 2433 > 2434 idx = savedcmd->map_pid_to_cmdline[tpid]; > 2435 if (idx == NO_CMDLINE_MAP) { > 2436 idx = (savedcmd->cmdline_idx + 1) % savedcmd->cmdline_num; > 2437 > 2438 savedcmd->map_pid_to_cmdline[tpid] = idx; > 2439 savedcmd->cmdline_idx = idx; > 2440 } > 2441 > 2442 savedcmd->map_cmdline_to_pid[idx] = tsk->pid; > 2443 set_cmdline(idx, tsk->comm); > 2444 > 2445 arch_spin_unlock(&trace_cmdline_lock); > 2446 > 2447 return 1; > 2448 } > 2449 >
