54
55static LIST_HEAD(thermal_tz_list);
56static LIST_HEAD(thermal_cdev_list);
57static DEFINE_MUTEX(thermal_list_lock);
58
59static int get_idr(struct idr *idr, struct mutex *lock, int *id)
60{
61 int err;
62
63 again:
64 if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
65 return -ENOMEM;
66
67 if (lock)
68 mutex_lock(lock);
69 err = idr_get_new(idr, NULL, id);
70 if (lock)
71 mutex_unlock(lock);
72 if (unlikely(err == -EAGAIN))
73 goto again;
74 else if (unlikely(err))
75 return err;
76
77 *id = *id & MAX_ID_MASK;
78 return 0;
79}
80
81static void release_idr(struct idr *idr, struct mutex *lock, int id)
82{
83 if (lock)
84 mutex_lock(lock);
85 idr_remove(idr, id);
86 if (lock)
87 mutex_unlock(lock);
88}
89
90
91
92#define to_thermal_zone(_dev) \
93 container_of(_dev, struct thermal_zone_device, device)
94