# define lg_do_unlock(l) arch_spin_unlock(l)
#else
# define lg_lock_ptr struct rt_mutex
-# define lg_do_lock(l) __rt_spin_lock(l)
+# define lg_do_lock(l) __rt_spin_lock__no_mg(l)
# define lg_do_unlock(l) __rt_spin_unlock(l)
#endif
/*
}
EXPORT_SYMBOL(lg_local_unlock_cpu);
+void lg_double_lock(struct lglock *lg, int cpu1, int cpu2)
+{
+ BUG_ON(cpu1 == cpu2);
+
+ /* lock in cpu order, just like lg_global_lock */
+ if (cpu2 < cpu1)
+ swap(cpu1, cpu2);
+
+ preempt_disable_nort();
+ lock_acquire_shared(&lg->lock_dep_map, 0, 0, NULL, _RET_IP_);
+ lg_do_lock(per_cpu_ptr(lg->lock, cpu1));
+ lg_do_lock(per_cpu_ptr(lg->lock, cpu2));
+}
+
+void lg_double_unlock(struct lglock *lg, int cpu1, int cpu2)
+{
+ lock_release(&lg->lock_dep_map, 1, _RET_IP_);
+ lg_do_unlock(per_cpu_ptr(lg->lock, cpu1));
+ lg_do_unlock(per_cpu_ptr(lg->lock, cpu2));
+ preempt_enable_nort();
+}
+
void lg_global_lock(struct lglock *lg)
{
int i;