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#ifndef _LITMUS_CEILING_H_
#define _LITMUS_CEILING_H_
#ifdef CONFIG_LITMUS_LOCKING
void __srp_ceiling_block(struct task_struct *cur);
DECLARE_PER_CPU(int, srp_objects_in_use);
/* assumes preemptions off */
void srp_ceiling_block(void)
{
struct task_struct *tsk = current;
/* Only applies to real-time tasks. */
if (!is_realtime(tsk))
return;
/* Bail out early if there aren't any SRP resources around. */
if (likely(!raw_cpu_read(srp_objects_in_use)))
return;
/* Avoid recursive ceiling blocking. */
if (unlikely(tsk->rt_param.srp_non_recurse))
return;
/* must take slow path */
__srp_ceiling_block(tsk);
}
#else
#define srp_ceiling_block() /* nothing */
#endif
#endif
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