ksys_close() was removed in 5.10.220, see:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=1aecdaa7e2c6619a7d2c0a81c8f5c06e52f870f3

--- a/ioctl.c
+++ b/ioctl.c
@@ -871,7 +871,7 @@ cryptodev_ioctl(struct file *filp, unsig
 		if (unlikely(ret)) {
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0))
 			sys_close(fd);
-#elif (LINUX_VERSION_CODE < KERNEL_VERSION(5, 11, 0))
+#elif (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 220))
 			ksys_close(fd);
 #else
 			close_fd(fd);