18 	struct kfifo kf;  member
38 	return __kfifo_alloc((struct __kfifo *)&buf->kf, length,  in __iio_allocate_kfifo()
49 		kfifo_free(&buf->kf);  in iio_request_update_kfifo()
55 		kfifo_reset_out(&buf->kf);  in iio_request_update_kfifo()
64 	struct iio_kfifo *kf = iio_to_kfifo(r);  in iio_mark_update_needed_kfifo()  local
65 	kf->update_needed = true;  in iio_mark_update_needed_kfifo()
94 	struct iio_kfifo *kf = iio_to_kfifo(r);  in iio_store_to_kfifo()  local
95 	ret = kfifo_in(&kf->kf, data, 1);  in iio_store_to_kfifo()
104 	struct iio_kfifo *kf = iio_to_kfifo(r);  in iio_read_kfifo()  local
106 	if (mutex_lock_interruptible(&kf->user_lock))  in iio_read_kfifo()
109 	if (!kfifo_initialized(&kf->kf) || n < kfifo_esize(&kf->kf))  in iio_read_kfifo()
112 		ret = kfifo_to_user(&kf->kf, buf, n, &copied);  in iio_read_kfifo()
113 	mutex_unlock(&kf->user_lock);  in iio_read_kfifo()
122 	struct iio_kfifo *kf = iio_to_kfifo(r);  in iio_kfifo_buf_data_available()  local
125 	mutex_lock(&kf->user_lock);  in iio_kfifo_buf_data_available()
126 	samples = kfifo_len(&kf->kf);  in iio_kfifo_buf_data_available()
127 	mutex_unlock(&kf->user_lock);  in iio_kfifo_buf_data_available()
134 	struct iio_kfifo *kf = iio_to_kfifo(buffer);  in iio_kfifo_buffer_release()  local
136 	mutex_destroy(&kf->user_lock);  in iio_kfifo_buffer_release()
137 	kfifo_free(&kf->kf);  in iio_kfifo_buffer_release()
138 	kfree(kf);  in iio_kfifo_buffer_release()
143 	struct iio_kfifo *kf = iio_to_kfifo(r);  in iio_kfifo_buf_space_available()  local
146 	mutex_lock(&kf->user_lock);  in iio_kfifo_buf_space_available()
147 	avail = kfifo_avail(&kf->kf);  in iio_kfifo_buf_space_available()
148 	mutex_unlock(&kf->user_lock);  in iio_kfifo_buf_space_available()
156 	struct iio_kfifo *kf = iio_to_kfifo(r);  in iio_kfifo_remove_from()  local
158 	if (kfifo_size(&kf->kf) < 1)  in iio_kfifo_remove_from()
161 	ret = kfifo_out(&kf->kf, data, 1);  in iio_kfifo_remove_from()
173 	struct iio_kfifo *kf = iio_to_kfifo(r);  in iio_kfifo_write()  local
176 	mutex_lock(&kf->user_lock);  in iio_kfifo_write()
177 	if (!kfifo_initialized(&kf->kf) || n < kfifo_esize(&kf->kf))  in iio_kfifo_write()
180 		ret = kfifo_from_user(&kf->kf, buf, n, &copied);  in iio_kfifo_write()
181 	mutex_unlock(&kf->user_lock);  in iio_kfifo_write()
205 	struct iio_kfifo *kf;  in iio_kfifo_allocate()  local
207 	kf = kzalloc(sizeof(*kf), GFP_KERNEL);  in iio_kfifo_allocate()
208 	if (!kf)  in iio_kfifo_allocate()
211 	kf->update_needed = true;  in iio_kfifo_allocate()
212 	iio_buffer_init(&kf->buffer);  in iio_kfifo_allocate()
213 	kf->buffer.access = &kfifo_access_funcs;  in iio_kfifo_allocate()
214 	kf->buffer.length = 2;  in iio_kfifo_allocate()
215 	mutex_init(&kf->user_lock);  in iio_kfifo_allocate()
217 	return &kf->buffer;  in iio_kfifo_allocate()