+--- xtables-addons-3.3/extensions/pknock/xt_pknock.c~ 2019-03-07 17:24:08.000000000 +0800
++++ xtables-addons-3.3/extensions/pknock/xt_pknock.c 2019-07-12 21:47:17.646586586 +0800
+@@ -1125,7 +1125,9 @@
+
+ crypto.size = crypto_shash_digestsize(crypto.tfm);
+ crypto.desc.tfm = crypto.tfm;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 2, 0)
+ crypto.desc.flags = 0;
++#endif
+
+ pde = proc_mkdir("xt_pknock", init_net.proc_net);
+ if (pde == NULL) {
+--- xtables-addons-3.3/extensions/xt_SYSRQ.c~ 2019-03-07 17:24:08.000000000 +0800
++++ xtables-addons-3.3/extensions/xt_SYSRQ.c 2019-07-12 21:48:48.456584594 +0800
+@@ -114,7 +114,9 @@
+ }
+
+ desc.tfm = sysrq_tfm;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 2, 0)
+ desc.flags = 0;
++#endif
+ ret = crypto_shash_init(&desc);
+ if (ret != 0)
+ goto hash_fail;