sparse irq_desc[] array: core kernel and x86 changes

[deliverable/linux.git] / include / linux / random.h

diff --git a/include/linux/random.h b/include/linux/random.h
index 36f125c0c6037f0270941e96e63790151a66fe34..ad9daa2374d5258cdfeddb589e81b7c6a7e51bb3 100644 (file)
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -44,6 +44,57 @@ struct rand_pool_info {
 
 extern void rand_initialize_irq(int irq);
 
+struct timer_rand_state;
+#ifndef CONFIG_SPARSE_IRQ
+
+extern struct timer_rand_state *irq_timer_state[];
+
+extern int nr_irqs;
+static inline struct timer_rand_state *get_timer_rand_state(unsigned int irq)
+{
+       if (irq >= nr_irqs)
+               return NULL;
+
+       return irq_timer_state[irq];
+}
+
+static inline void set_timer_rand_state(unsigned int irq, struct timer_rand_state *state)
+{
+       if (irq >= nr_irqs)
+               return;
+
+       irq_timer_state[irq] = state;
+}
+
+#else
+
+#include <linux/irq.h>
+static inline struct timer_rand_state *get_timer_rand_state(unsigned int irq)
+{
+       struct irq_desc *desc;
+
+       desc = irq_to_desc(irq);
+
+       if (!desc)
+               return NULL;
+
+       return desc->timer_rand_state;
+}
+
+static inline void set_timer_rand_state(unsigned int irq, struct timer_rand_state *state)
+{
+       struct irq_desc *desc;
+
+       desc = irq_to_desc(irq);
+
+       if (!desc)
+               return;
+
+       desc->timer_rand_state = state;
+}
+#endif
+
+
 extern void add_input_randomness(unsigned int type, unsigned int code,
                                 unsigned int value);
 extern void add_interrupt_randomness(int irq);