| 51,6 → 51,7 |
|---|
| #include <arch/interrupt.h> |
| #include <sysinfo/sysinfo.h> |
| #include <synch/spinlock.h> |
| #include <synch/rcu.h> |
| |
| #define LSR_DATA_READY 0x01 |
| |
| 86,9 → 87,9 |
|---|
| while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) |
| (void) ns16550_rbr_read(&ns16550); |
| |
| spinlock_lock(&ns16550_irq.lock); |
| ns16550_irq.notif_cfg.notify = false; |
| spinlock_unlock(&ns16550_irq.lock); |
| //rcu_read_lock() is not needed, ints are disabled |
| //rcu: atomic update doesn't need reallocation |
| rcu_dereference_pointer(ns16550_irq.notif_cfg).notify = false; |
| interrupts_restore(ipl); |
| } |
| |
| 96,9 → 97,10 |
|---|
| void ns16550_release(void) |
| { |
| ipl_t ipl = interrupts_disable(); |
| //rcu: atomic update doesn't need reallocation |
| spinlock_lock(&ns16550_irq.lock); |
| if (ns16550_irq.notif_cfg.answerbox) |
| ns16550_irq.notif_cfg.notify = true; |
| if (rcu_dereference_pointer(ns16550_irq.notif_cfg).answerbox) |
| rcu_dereference_pointer(ns16550_irq.notif_cfg).notify = true; |
| spinlock_unlock(&ns16550_irq.lock); |
| interrupts_restore(ipl); |
| } |
| 183,7 → 185,7 |
|---|
| spinlock_lock(&ns16550_irq.lock); |
| |
| if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) { |
| if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) { |
| if (rcu_dereference_pointer(ns16550_irq.notif_cfg).notify && rcu_dereference_pointer(ns16550_irq.notif_cfg).answerbox) { |
| /* |
| * Send IPC notification. |
| */ |