From e8dd273d199f5bbe295a8e3d8b777c5505b6b2e1 Mon Sep 17 00:00:00 2001 From: Salah Triki Date: Thu, 17 Sep 2026 14:00:52 +0100 Subject: iio: proximity: isl29501: Fix return type of isl29501_register_write isl29501_register_write() was returning a u32 instead of an int. Since the function returns negative error codes (such as -ERANGE or return values from i2c_smbus_write_byte_data()), returning an unsigned integer type prevents callers from correctly checking for negative error conditions. Fix this by changing the function return type from u32 to int. This was found through manual code review. Fixes: 1c28799257bc ("iio: light: isl29501: Add support for the ISL29501 ToF sensor.") Signed-off-by: Salah Triki Reviewed-by: Joshua Crofts Cc: stable@vger.kernel.org Signed-off-by: Jonathan Cameron --- init/init_task.c | 279 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 init/init_task.c (limited to 'init/init_task.c') diff --git a/init/init_task.c b/init/init_task.c new file mode 100644 index 000000000..adb207cd9 --- /dev/null +++ b/init/init_task.c @@ -0,0 +1,279 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static struct signal_struct init_signals = { + .nr_threads = 1, + .thread_head = LIST_HEAD_INIT(init_task.thread_node), + .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(init_signals.wait_chldexit), + .shared_pending = { + .list = LIST_HEAD_INIT(init_signals.shared_pending.list), + .signal = {{0}} + }, + .multiprocess = HLIST_HEAD_INIT, + .rlim = INIT_RLIMITS, +#ifdef CONFIG_CGROUPS + .cgroup_threadgroup_rwsem = __RWSEM_INITIALIZER(init_signals.cgroup_threadgroup_rwsem), +#endif + .cred_guard_mutex = __MUTEX_INITIALIZER(init_signals.cred_guard_mutex), + .exec_update_lock = __RWSEM_INITIALIZER(init_signals.exec_update_lock), +#ifdef CONFIG_POSIX_TIMERS + .posix_timers = HLIST_HEAD_INIT, + .ignored_posix_timers = HLIST_HEAD_INIT, + .cputimer = { + .cputime_atomic = INIT_CPUTIME_ATOMIC, + }, +#endif + INIT_CPU_TIMERS(init_signals) + .pids = { + [PIDTYPE_PID] = &init_struct_pid, + [PIDTYPE_TGID] = &init_struct_pid, + [PIDTYPE_PGID] = &init_struct_pid, + [PIDTYPE_SID] = &init_struct_pid, + }, + INIT_PREV_CPUTIME(init_signals) +}; + +static struct sighand_struct init_sighand = { + .count = REFCOUNT_INIT(1), + .action = { { { .sa_handler = SIG_DFL, } }, }, + .siglock = __SPIN_LOCK_UNLOCKED(init_sighand.siglock), + .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(init_sighand.signalfd_wqh), +}; + +/* init to 2 - one for init_task, one to ensure it is never freed */ +struct task_exec_state init_task_exec_state = { + .count = REFCOUNT_INIT(2), + .dumpable = TASK_DUMPABLE_OWNER, + .user_ns = &init_user_ns, +}; + +#ifdef CONFIG_SHADOW_CALL_STACK +unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] = { + [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC +}; +#endif + +/* init to 2 - one for init_task, one to ensure it is never freed */ +static struct group_info init_groups = { .usage = REFCOUNT_INIT(2) }; + +/* + * The initial credentials for the initial task + */ +static struct cred init_cred = { + .usage = ATOMIC_INIT(4), + .uid = GLOBAL_ROOT_UID, + .gid = GLOBAL_ROOT_GID, + .suid = GLOBAL_ROOT_UID, + .sgid = GLOBAL_ROOT_GID, + .euid = GLOBAL_ROOT_UID, + .egid = GLOBAL_ROOT_GID, + .fsuid = GLOBAL_ROOT_UID, + .fsgid = GLOBAL_ROOT_GID, + .securebits = SECUREBITS_DEFAULT, + .cap_inheritable = CAP_EMPTY_SET, + .cap_permitted = CAP_FULL_SET, + .cap_effective = CAP_FULL_SET, + .cap_bset = CAP_FULL_SET, + .user = INIT_USER, + .user_ns = &init_user_ns, + .group_info = &init_groups, + .ucounts = &init_ucounts, +}; + +/* + * Set up the first task table, touch at your own risk!. Base=0, + * limit=0x1fffff (=2MB) + */ +struct task_struct init_task __aligned(L1_CACHE_BYTES) = { +#ifdef CONFIG_THREAD_INFO_IN_TASK + .thread_info = INIT_THREAD_INFO(init_task), + .stack_refcount = REFCOUNT_INIT(1), +#endif + .__state = 0, + .stack = init_stack, + .usage = REFCOUNT_INIT(2), + .flags = PF_KTHREAD, + .prio = MAX_PRIO - 20, + .static_prio = MAX_PRIO - 20, + .normal_prio = MAX_PRIO - 20, + .policy = SCHED_NORMAL, + .cpus_ptr = &init_task.cpus_mask, + .user_cpus_ptr = NULL, + .cpus_mask = CPU_MASK_ALL, + .max_allowed_capacity = SCHED_CAPACITY_SCALE, + .nr_cpus_allowed= NR_CPUS, + .mm = NULL, + .active_mm = &init_mm, + .exec_state = &init_task_exec_state, + .restart_block = { + .fn = do_no_restart_syscall, + }, + .se = { + .group_node = LIST_HEAD_INIT(init_task.se.group_node), + }, + .rt = { + .run_list = LIST_HEAD_INIT(init_task.rt.run_list), + .time_slice = RR_TIMESLICE, + }, + .tasks = LIST_HEAD_INIT(init_task.tasks), +#ifdef CONFIG_SMP + .pushable_tasks = PLIST_NODE_INIT(init_task.pushable_tasks, MAX_PRIO), +#endif +#ifdef CONFIG_CGROUP_SCHED + .sched_task_group = &root_task_group, +#endif +#ifdef CONFIG_SCHED_CLASS_EXT + .scx = { + .dsq_list.node = LIST_HEAD_INIT(init_task.scx.dsq_list.node), + .sticky_cpu = -1, + .holding_cpu = -1, + .runnable_cpu = -1, + .runnable_node = LIST_HEAD_INIT(init_task.scx.runnable_node), + .runnable_at = INITIAL_JIFFIES, + .ddsp_dsq_id = SCX_DSQ_INVALID, + .slice = SCX_SLICE_DFL, + }, +#endif + .ptraced = LIST_HEAD_INIT(init_task.ptraced), + .ptrace_entry = LIST_HEAD_INIT(init_task.ptrace_entry), + .real_parent = &init_task, + .parent = &init_task, + .children = LIST_HEAD_INIT(init_task.children), + .sibling = LIST_HEAD_INIT(init_task.sibling), + .group_leader = &init_task, + RCU_POINTER_INITIALIZER(real_cred, &init_cred), + RCU_POINTER_INITIALIZER(cred, &init_cred), + .comm = INIT_TASK_COMM, + .thread = INIT_THREAD, + .real_fs = &init_fs, + .fs = &init_fs, + .files = &init_files, +#ifdef CONFIG_IO_URING + .io_uring = NULL, +#endif + .signal = &init_signals, + .sighand = &init_sighand, + .nsproxy = &init_nsproxy, + .pending = { + .list = LIST_HEAD_INIT(init_task.pending.list), + .signal = {{0}} + }, + .blocked = {{0}}, + .alloc_lock = __SPIN_LOCK_UNLOCKED(init_task.alloc_lock), + .journal_info = NULL, + INIT_CPU_TIMERS(init_task) + .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.pi_lock), + .blocked_lock = __RAW_SPIN_LOCK_UNLOCKED(init_task.blocked_lock), + .timer_slack_ns = 50000, /* 50 usec default slack */ + .thread_pid = &init_struct_pid, + .thread_node = LIST_HEAD_INIT(init_signals.thread_head), +#ifdef CONFIG_AUDIT + .loginuid = INVALID_UID, + .sessionid = AUDIT_SID_UNSET, +#endif +#ifdef CONFIG_PERF_EVENTS + .perf_event_mutex = __MUTEX_INITIALIZER(init_task.perf_event_mutex), + .perf_event_list = LIST_HEAD_INIT(init_task.perf_event_list), +#endif +#ifdef CONFIG_PREEMPT_RCU + .rcu_read_lock_nesting = 0, + .rcu_read_unlock_special.s = 0, + .rcu_node_entry = LIST_HEAD_INIT(init_task.rcu_node_entry), + .rcu_blocked_node = NULL, +#endif +#ifdef CONFIG_TASKS_RCU + .rcu_tasks_holdout = false, + .rcu_tasks_holdout_list = LIST_HEAD_INIT(init_task.rcu_tasks_holdout_list), + .rcu_tasks_idle_cpu = -1, + .rcu_tasks_exit_list = LIST_HEAD_INIT(init_task.rcu_tasks_exit_list), +#endif +#ifdef CONFIG_TASKS_TRACE_RCU + .trc_reader_nesting = 0, +#endif +#ifdef CONFIG_CPUSETS + .mems_allowed_seq = SEQCNT_SPINLOCK_ZERO(init_task.mems_allowed_seq, + &init_task.alloc_lock), +#endif + .blocked_donor = NULL, +#ifdef CONFIG_RT_MUTEXES + .pi_waiters = RB_ROOT_CACHED, + .pi_top_task = NULL, +#endif + INIT_PREV_CPUTIME(init_task) +#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN + .vtime.seqcount = SEQCNT_ZERO(init_task.vtime_seqcount), + .vtime.starttime = 0, + .vtime.state = VTIME_SYS, +#endif +#ifdef CONFIG_NUMA_BALANCING + .numa_preferred_nid = NUMA_NO_NODE, + .numa_group = NULL, + .numa_faults = NULL, +#endif +#ifdef CONFIG_SCHED_CACHE + .preferred_llc = -1, + .pref_llc_queued = 0, +#endif +#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) + .kasan_depth = 1, +#endif +#ifdef CONFIG_KCSAN + .kcsan_ctx = { + .scoped_accesses = {LIST_POISON1, NULL}, + }, +#endif +#ifdef CONFIG_TRACE_IRQFLAGS + .softirqs_enabled = 1, +#endif +#ifdef CONFIG_LOCKDEP + .lockdep_depth = 0, /* no locks held yet */ + .curr_chain_key = INITIAL_CHAIN_KEY, + .lockdep_recursion = 0, +#endif +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + .ret_stack = NULL, + .tracing_graph_pause = ATOMIC_INIT(0), +#endif +#if defined(CONFIG_TRACING) && defined(CONFIG_PREEMPTION) + .trace_recursion = 0, +#endif +#ifdef CONFIG_LIVEPATCH + .patch_state = KLP_TRANSITION_IDLE, +#endif +#ifdef CONFIG_SECURITY + .security = NULL, +#endif +#ifdef CONFIG_SECCOMP_FILTER + .seccomp = { .filter_count = ATOMIC_INIT(0) }, +#endif +#ifdef CONFIG_SCHED_MM_CID + .mm_cid = { .cid = MM_CID_UNSET, }, +#endif +}; +EXPORT_SYMBOL(init_task); + +/* + * Initial thread structure. Alignment of this is handled by a special + * linker map entry. + */ +#ifndef CONFIG_THREAD_INFO_IN_TASK +struct thread_info init_thread_info __init_thread_info = INIT_THREAD_INFO(init_task); +#endif -- cgit v1.3.1