diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/hashtab.c | 14 | ||||
| -rw-r--r-- | kernel/irq_work.c | 9 | ||||
| -rw-r--r-- | kernel/locking/rtmutex.c | 2 | ||||
| -rw-r--r-- | kernel/module.c | 8 | ||||
| -rw-r--r-- | kernel/time/timer.c | 6 |
5 files changed, 25 insertions, 14 deletions
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c index 83c209d9b17a..972b76bf54b7 100644 --- a/kernel/bpf/hashtab.c +++ b/kernel/bpf/hashtab.c @@ -17,7 +17,7 @@ struct bpf_htab { struct bpf_map map; struct hlist_head *buckets; - spinlock_t lock; + raw_spinlock_t lock; u32 count; /* number of elements in this hashtable */ u32 n_buckets; /* number of hash buckets */ u32 elem_size; /* size of each element in bytes */ @@ -82,7 +82,7 @@ static struct bpf_map *htab_map_alloc(union bpf_attr *attr) for (i = 0; i < htab->n_buckets; i++) INIT_HLIST_HEAD(&htab->buckets[i]); - spin_lock_init(&htab->lock); + raw_spin_lock_init(&htab->lock); htab->count = 0; htab->elem_size = sizeof(struct htab_elem) + @@ -230,7 +230,7 @@ static int htab_map_update_elem(struct bpf_map *map, void *key, void *value, l_new->hash = htab_map_hash(l_new->key, key_size); /* bpf_map_update_elem() can be called in_irq() */ - spin_lock_irqsave(&htab->lock, flags); + raw_spin_lock_irqsave(&htab->lock, flags); head = select_bucket(htab, l_new->hash); @@ -266,11 +266,11 @@ static int htab_map_update_elem(struct bpf_map *map, void *key, void *value, } else { htab->count++; } - spin_unlock_irqrestore(&htab->lock, flags); + raw_spin_unlock_irqrestore(&htab->lock, flags); return 0; err: - spin_unlock_irqrestore(&htab->lock, flags); + raw_spin_unlock_irqrestore(&htab->lock, flags); kfree(l_new); return ret; } @@ -291,7 +291,7 @@ static int htab_map_delete_elem(struct bpf_map *map, void *key) hash = htab_map_hash(key, key_size); - spin_lock_irqsave(&htab->lock, flags); + raw_spin_lock_irqsave(&htab->lock, flags); head = select_bucket(htab, hash); @@ -304,7 +304,7 @@ static int htab_map_delete_elem(struct bpf_map *map, void *key) ret = 0; } - spin_unlock_irqrestore(&htab->lock, flags); + raw_spin_unlock_irqrestore(&htab->lock, flags); return ret; } diff --git a/kernel/irq_work.c b/kernel/irq_work.c index 5a0f4525139c..58cf46638ca0 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -200,8 +200,17 @@ void irq_work_tick(void) if (!llist_empty(raised) && !arch_irq_work_has_interrupt()) irq_work_run_list(raised); + + if (!IS_ENABLED(CONFIG_PREEMPT_RT_FULL)) + irq_work_run_list(this_cpu_ptr(&lazy_list)); +} + +#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) +void irq_work_tick_soft(void) +{ irq_work_run_list(this_cpu_ptr(&lazy_list)); } +#endif /* * Synchronize against the irq_work @entry, ensures the entry is not diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index 2822aceb8dfb..20267595df07 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -2141,7 +2141,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock, ret = 0; } - if (unlikely(ret)) + if (ret && rt_mutex_has_waiters(lock)) remove_waiter(lock, waiter); raw_spin_unlock(&lock->wait_lock); diff --git a/kernel/module.c b/kernel/module.c index cfc9e843a924..3b9ff966edb9 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -906,11 +906,15 @@ void symbol_put_addr(void *addr) if (core_kernel_text(a)) return; - /* module_text_address is safe here: we're supposed to have reference - * to module from symbol_get, so it can't go away. */ + /* + * Even though we hold a reference on the module; we still need to + * disable preemption in order to safely traverse the data structure. + */ + preempt_disable(); modaddr = __module_text_address(a); BUG_ON(!modaddr); module_put(modaddr); + preempt_enable(); } EXPORT_SYMBOL_GPL(symbol_put_addr); diff --git a/kernel/time/timer.c b/kernel/time/timer.c index adb1d82d6631..c68ba873da3c 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1455,7 +1455,7 @@ void update_process_times(int user_tick) scheduler_tick(); run_local_timers(); rcu_check_callbacks(user_tick); -#if defined(CONFIG_IRQ_WORK) && !defined(CONFIG_PREEMPT_RT_FULL) +#if defined(CONFIG_IRQ_WORK) if (in_irq()) irq_work_tick(); #endif @@ -1471,9 +1471,7 @@ static void run_timer_softirq(struct softirq_action *h) hrtimer_run_pending(); -#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT_FULL) - irq_work_tick(); -#endif + irq_work_tick_soft(); if (time_after_eq(jiffies, base->timer_jiffies)) __run_timers(base); |