Update API

- io_uring_sqe added a data field that's passed back at completion
- io_uring_sqe added an index field, for fixed buffer locations
- io_uring_setup(2) system call added a 'nr_iovecs' field

Signed-off-by: Jens Axboe <axboe@kernel.dk>

src/syscall.c

@@ -18,9 +18,9 @@
 #endif
 
 int io_uring_setup(unsigned int entries, struct iovec *iovecs,
-		   struct io_uring_params *p)
+		   unsigned nr_iovecs, struct io_uring_params *p)
 {
-	return syscall(__NR_sys_io_uring_setup, entries, iovecs, p);
+	return syscall(__NR_sys_io_uring_setup, entries, iovecs, nr_iovecs, p);
 }
 
 int io_uring_enter(int fd, unsigned int to_submit, unsigned int min_complete,