test: add KPATCH_PRINTK test

test/integration/macro-printk.patch

@@ -0,0 +1,155 @@
+Index: src/net/ipv4/fib_frontend.c
+===================================================================
+--- src.orig/net/ipv4/fib_frontend.c
++++ src/net/ipv4/fib_frontend.c
+@@ -626,6 +626,7 @@ errout:
+ 	return err;
+ }
+ 
++#include "kpatch-macros.h"
+ static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh)
+ {
+ 	struct net *net = sock_net(skb->sk);
+@@ -644,6 +645,7 @@ static int inet_rtm_newroute(struct sk_b
+ 	}
+ 
+ 	err = fib_table_insert(tb, &cfg);
++	KPATCH_PRINTK("[inet_rtm_newroute]: err is %d\n", err);
+ errout:
+ 	return err;
+ }
+Index: src/net/ipv4/fib_semantics.c
+===================================================================
+--- src.orig/net/ipv4/fib_semantics.c
++++ src/net/ipv4/fib_semantics.c
+@@ -773,6 +773,7 @@ __be32 fib_info_update_nh_saddr(struct n
+ 	return nh->nh_saddr;
+ }
+ 
++#include "kpatch-macros.h"
+ struct fib_info *fib_create_info(struct fib_config *cfg)
+ {
+ 	int err;
+@@ -797,6 +798,7 @@ struct fib_info *fib_create_info(struct
+ #endif
+ 
+ 	err = -ENOBUFS;
++	KPATCH_PRINTK("[fib_create_info]: create error err is %d\n",err);
+ 	if (fib_info_cnt >= fib_info_hash_size) {
+ 		unsigned int new_size = fib_info_hash_size << 1;
+ 		struct hlist_head *new_info_hash;
+@@ -817,6 +819,7 @@ struct fib_info *fib_create_info(struct
+ 		if (!fib_info_hash_size)
+ 			goto failure;
+ 	}
++	KPATCH_PRINTK("[fib_create_info]: 2 create error err is %d\n",err);
+ 
+ 	fi = kzalloc(sizeof(*fi)+nhs*sizeof(struct fib_nh), GFP_KERNEL);
+ 	if (fi == NULL)
+@@ -828,6 +831,7 @@ struct fib_info *fib_create_info(struct
+ 			goto failure;
+ 	} else
+ 		fi->fib_metrics = (u32 *) dst_default_metrics;
++	KPATCH_PRINTK("[fib_create_info]: 3 create error err is %d\n",err);
+ 
+ 	fi->fib_net = hold_net(net);
+ 	fi->fib_protocol = cfg->fc_protocol;
+@@ -844,6 +848,7 @@ struct fib_info *fib_create_info(struct
+ 		if (!nexthop_nh->nh_pcpu_rth_output)
+ 			goto failure;
+ 	} endfor_nexthops(fi)
++	KPATCH_PRINTK("[fib_create_info]: 4 create error err is %d\n",err);
+ 
+ 	if (cfg->fc_mx) {
+ 		struct nlattr *nla;
+@@ -866,6 +871,7 @@ struct fib_info *fib_create_info(struct
+ 			}
+ 		}
+ 	}
++	KPATCH_PRINTK("[fib_create_info]: 5 create error err is %d\n",err);
+ 
+ 	if (cfg->fc_mp) {
+ #ifdef CONFIG_IP_ROUTE_MULTIPATH
+@@ -898,6 +904,7 @@ struct fib_info *fib_create_info(struct
+ 		nh->nh_weight = 1;
+ #endif
+ 	}
++	KPATCH_PRINTK("[fib_create_info]: 6 create error err is %d\n",err);
+ 
+ 	if (fib_props[cfg->fc_type].error) {
+ 		if (cfg->fc_gw || cfg->fc_oif || cfg->fc_mp)
+@@ -915,6 +922,7 @@ struct fib_info *fib_create_info(struct
+ 			goto err_inval;
+ 		}
+ 	}
++	KPATCH_PRINTK("[fib_create_info]: 7 create error err is %d\n",err);
+ 
+ 	if (cfg->fc_scope > RT_SCOPE_HOST)
+ 		goto err_inval;
+@@ -937,6 +945,7 @@ struct fib_info *fib_create_info(struct
+ 				goto failure;
+ 		} endfor_nexthops(fi)
+ 	}
++	KPATCH_PRINTK("[fib_create_info]: 8 create error err is %d\n",err);
+ 
+ 	if (fi->fib_prefsrc) {
+ 		if (cfg->fc_type != RTN_LOCAL || !cfg->fc_dst ||
+@@ -948,6 +957,7 @@ struct fib_info *fib_create_info(struct
+ 	change_nexthops(fi) {
+ 		fib_info_update_nh_saddr(net, nexthop_nh);
+ 	} endfor_nexthops(fi)
++	KPATCH_PRINTK("[fib_create_info]: 9 create error err is %d\n",err);
+ 
+ link_it:
+ 	ofi = fib_find_info(fi);
+@@ -957,6 +967,7 @@ link_it:
+ 		ofi->fib_treeref++;
+ 		return ofi;
+ 	}
++	KPATCH_PRINTK("[fib_create_info]: 10 create error err is %d\n",err);
+ 
+ 	fi->fib_treeref++;
+ 	atomic_inc(&fi->fib_clntref);
+@@ -980,6 +991,7 @@ link_it:
+ 		hlist_add_head(&nexthop_nh->nh_hash, head);
+ 	} endfor_nexthops(fi)
+ 	spin_unlock_bh(&fib_info_lock);
++	KPATCH_PRINTK("[fib_create_info]: 11 create error err is %d\n",err);
+ 	return fi;
+ 
+ err_inval:
+@@ -990,6 +1002,7 @@ failure:
+ 		fi->fib_dead = 1;
+ 		free_fib_info(fi);
+ 	}
++	KPATCH_PRINTK("[fib_create_info]: 12 create error err is %d\n",err);
+ 
+ 	return ERR_PTR(err);
+ }
+Index: src/net/ipv4/fib_trie.c
+===================================================================
+--- src.orig/net/ipv4/fib_trie.c
++++ src/net/ipv4/fib_trie.c
+@@ -1161,6 +1161,7 @@ done:
+ /*
+  * Caller must hold RTNL.
+  */
++#include "kpatch-macros.h"
+ int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
+ {
+ 	struct trie *t = (struct trie *) tb->tb_data;
+@@ -1187,11 +1188,14 @@ int fib_table_insert(struct fib_table *t
+ 
+ 	key = key & mask;
+ 
++	KPATCH_PRINTK("[fib_table_insert]: start\n");
+ 	fi = fib_create_info(cfg);
+ 	if (IS_ERR(fi)) {
+ 		err = PTR_ERR(fi);
++		KPATCH_PRINTK("[fib_table_insert]: create error err is %d\n",err);
+ 		goto err;
+ 	}
++	KPATCH_PRINTK("[fib_table_insert]: cross\n");
+ 
+ 	l = fib_find_node(t, key);
+ 	fa = NULL;