include/linux/kfifo.h

15  *   in-place "struct kfifo" object
16  * - Init the in-place object with kfifo_alloc() or kfifo_init()
17  *   Note: The address of the in-place "struct kfifo" object must be
33  * in the reader thread.
45 	unsigned int	in;
98  * helper macro to distinguish between real in place fifo where the fifo
116  * @size: the number of elements in the fifo, this must be a power of 2
128 	__kfifo->in = 0; \
139  * @size: the number of elements in the fifo, this must be a power of 2
148 			.in	= 0, \
196  * kfifo_size - returns the size of the fifo in elements
212 	__tmp->kfifo.in = __tmp->kfifo.out = 0; \
221  * it is dangerous and must be handled in the same way as kfifo_reset().
226 	__tmp->kfifo.out = __tmp->kfifo.in; \
230  * kfifo_len - returns the number of used elements in the fifo
236 	__tmpl->kfifo.in - __tmpl->kfifo.out; \
246 	__tmpq->kfifo.in == __tmpq->kfifo.out; \
291  * kfifo_avail - returns the number of unused elements in the fifo
325  * This function returns the size of the next fifo record in number of bytes.
341  * @size: the number of elements in the fifo, this must be a power of 2
421 			)[__kfifo->in & __tmp->kfifo.mask] = \
424 			__kfifo->in++; \
571 /* alias for kfifo_in_spinlocked, will be removed in a future release */
645 /* alias for kfifo_out_spinlocked, will be removed in a future release */
709  * @nents: number of entries in the scatterlist array
713  * It returns the number entries in the scatterlist array.
736  * This macro finish a DMA IN operation. The in counter will be updated by
751 		__kfifo->in += __len / sizeof(*__tmp->type); \
758  * @nents: number of entries in the scatterlist array
763  * It returns the number entries in the scatterlist array.