linux-master/fs/splice.c

1744 	unsigned int i_head, o_head;
1769 	o_head = opipe->head;
1793 		    pipe_full(o_head, o_tail, opipe->max_usage)) {
1814 		obuf = &opipe->bufs[o_head & o_mask];
1826 			o_head++;
1827 			opipe->head = o_head;
1851 			o_head++;
1852 			opipe->head = o_head;
1881 	unsigned int i_head, o_head;
1895 	o_head = opipe->head;
1914 		    pipe_full(o_head, o_tail, opipe->max_usage))
1918 		obuf = &opipe->bufs[o_head & o_mask];
1944 		o_head++;
1945 		opipe->head = o_head;