selftests/bpf: Remove SEC("version") from test progs

Since commit 6c4fc209fcf9d ("bpf: remove useless version check for prog
load") these "version" sections, which result in bpf_attr.kern_version
being set, have been unnecessary.

Remove them so that it's obvious to folks using selftests as a guide that
"modern" BPF progs don't need this section.

Signed-off-by: Dave Marchevsky <[e-mail]>
Signed-off-by: Andrii Nakryiko <[e-mail]>
Link: https://lore.kernel.org/bpf/[e-mail]

tools/testing/selftests/bpf/progs/cgroup_skb_sk_lookup_kern.c

···
 #include <sys/types.h>
 #include <sys/socket.h>
 
-int _version SEC("version") = 1;
 char _license[] SEC("license") = "GPL";
 
 __u16 g_serv_port = 0;

tools/testing/selftests/bpf/progs/connect4_prog.c

···
 #define IFNAMSIZ 16
 #endif
 
-int _version SEC("version") = 1;
-
 __attribute__ ((noinline))
 int do_bind(struct bpf_sock_addr *ctx)
 {

tools/testing/selftests/bpf/progs/connect6_prog.c

···
 
 #define DST_REWRITE_PORT6	6666
 
-int _version SEC("version") = 1;
-
 SEC("cgroup/connect6")
 int connect_v6_prog(struct bpf_sock_addr *ctx)
 {

tools/testing/selftests/bpf/progs/connect_force_port4.c

···
 #include <bpf_sockopt_helpers.h>
 
 char _license[] SEC("license") = "GPL";
-int _version SEC("version") = 1;
 
 struct svc_addr {
 	__be32 addr;

tools/testing/selftests/bpf/progs/connect_force_port6.c

···
 #include <bpf_sockopt_helpers.h>
 
 char _license[] SEC("license") = "GPL";
-int _version SEC("version") = 1;
 
 struct svc_addr {
 	__be32 addr[4];

tools/testing/selftests/bpf/progs/dev_cgroup.c

···
 }
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = LINUX_VERSION_CODE;

tools/testing/selftests/bpf/progs/get_cgroup_id_kern.c

···
 }
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */

tools/testing/selftests/bpf/progs/map_ptr_kern.c

···
 	return 1;
 }
 
-__u32 _version SEC("version") = 1;
 char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/netcnt_prog.c

···
 }
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = LINUX_VERSION_CODE;

tools/testing/selftests/bpf/progs/sendmsg4_prog.c

···
 #define DST_PORT		4040
 #define DST_REWRITE_PORT4	4444
 
-int _version SEC("version") = 1;
-
 SEC("cgroup/sendmsg4")
 int sendmsg_v4_prog(struct bpf_sock_addr *ctx)
 {

tools/testing/selftests/bpf/progs/sendmsg6_prog.c

···
 
 #define DST_REWRITE_PORT6	6666
 
-int _version SEC("version") = 1;
-
 SEC("cgroup/sendmsg6")
 int sendmsg_v6_prog(struct bpf_sock_addr *ctx)
 {

tools/testing/selftests/bpf/progs/sockmap_parse_prog.c

···
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_endian.h>
 
-int _version SEC("version") = 1;
-
 SEC("sk_skb1")
 int bpf_prog1(struct __sk_buff *skb)
 {

tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c

···
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_endian.h>
 
-int _version SEC("version") = 1;
-
 SEC("sk_msg1")
 int bpf_prog1(struct sk_msg_md *msg)
 {

tools/testing/selftests/bpf/progs/sockmap_verdict_prog.c

···
 #include <bpf/bpf_helpers.h>
 #include <bpf/bpf_endian.h>
 
-int _version SEC("version") = 1;
-
 struct {
 	__uint(type, BPF_MAP_TYPE_SOCKMAP);
 	__uint(max_entries, 20);

tools/testing/selftests/bpf/progs/sockopt_inherit.c

···
 #include <bpf/bpf_helpers.h>
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = 1;
 
 #define SOL_CUSTOM			0xdeadbeef
 #define CUSTOM_INHERIT1			0

tools/testing/selftests/bpf/progs/tcp_rtt.c

···
 #include <bpf/bpf_helpers.h>
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = 1;
 
 struct tcp_rtt_storage {
 	__u32 invoked;

tools/testing/selftests/bpf/progs/test_btf_haskv.c

···
 #include <bpf/bpf_helpers.h>
 #include "bpf_legacy.h"
 
-int _version SEC("version") = 1;
-
 struct ipv_counts {
 	unsigned int v4;
 	unsigned int v6;

tools/testing/selftests/bpf/progs/test_btf_newkv.c

···
 #include <bpf/bpf_helpers.h>
 #include "bpf_legacy.h"
 
-int _version SEC("version") = 1;
-
 struct ipv_counts {
 	unsigned int v4;
 	unsigned int v6;

tools/testing/selftests/bpf/progs/test_btf_nokv.c

···
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 
-int _version SEC("version") = 1;
-
 struct ipv_counts {
 	unsigned int v4;
 	unsigned int v6;

tools/testing/selftests/bpf/progs/test_l4lb.c

···
 #include "test_iptunnel_common.h"
 #include <bpf/bpf_endian.h>
 
-int _version SEC("version") = 1;
-
 static inline __u32 rol32(__u32 word, unsigned int shift)
 {
 	return (word << shift) | (word >> ((-shift) & 31));

tools/testing/selftests/bpf/progs/test_map_in_map.c

···
 	return XDP_PASS;
 }
 
-int _version SEC("version") = 1;
 char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/test_pinning.c

···
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 
-int _version SEC("version") = 1;
-
 struct {
 	__uint(type, BPF_MAP_TYPE_ARRAY);
 	__uint(max_entries, 1);

tools/testing/selftests/bpf/progs/test_pinning_invalid.c

···
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 
-int _version SEC("version") = 1;
-
 struct {
 	__uint(type, BPF_MAP_TYPE_ARRAY);
 	__uint(max_entries, 1);

tools/testing/selftests/bpf/progs/test_pkt_access.c

···
 #include <bpf/bpf_endian.h>
 
 #define barrier() __asm__ __volatile__("": : :"memory")
-int _version SEC("version") = 1;
 
 /* llvm will optimize both subprograms into exactly the same BPF assembly
  *

tools/testing/selftests/bpf/progs/test_queue_stack_map.h

···
 #include <linux/pkt_cls.h>
 #include <bpf/bpf_helpers.h>
 
-int _version SEC("version") = 1;
-
 struct {
 	__uint(type, MAP_TYPE);
 	__uint(max_entries, 32);

tools/testing/selftests/bpf/progs/test_select_reuseport_kern.c

···
 #include <bpf/bpf_helpers.h>
 #include "test_select_reuseport_common.h"
 
-int _version SEC("version") = 1;
-
 #ifndef offsetof
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 #endif

tools/testing/selftests/bpf/progs/test_sk_lookup.c

···
 }
 
 char _license[] SEC("license") = "Dual BSD/GPL";
-__u32 _version SEC("version") = 1;

tools/testing/selftests/bpf/progs/test_skb_cgroup_id_kern.c

···
 	return TC_ACT_OK;
 }
 
-int _version SEC("version") = 1;
-
 char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/test_skb_ctx.c

···
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 
-int _version SEC("version") = 1;
 char _license[] SEC("license") = "GPL";
 
 SEC("skb_ctx")

tools/testing/selftests/bpf/progs/test_sockmap_kern.h

···
 	return SK_DROP;
 }
 
-int _version SEC("version") = 1;
 char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/test_sockmap_listen.c

···
 	return verdict;
 }
 
-int _version SEC("version") = 1;
 char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/test_stacktrace_build_id.c

···
 }
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */

tools/testing/selftests/bpf/progs/test_tcp_estats.c

···
 }
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */

tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c

···
 #include "test_tcpbpf.h"
 
 struct tcpbpf_globals global = {};
-int _version SEC("version") = 1;
 
 /**
  * SOL_TCP is defined in <netinet/tcp.h> while

tools/testing/selftests/bpf/progs/test_tcpnotify_kern.c

···
 	__type(value, __u32);
 } perf_event_map SEC(".maps");
 
-int _version SEC("version") = 1;
-
 SEC("sockops")
 int bpf_testcb(struct bpf_sock_ops *skops)
 {

tools/testing/selftests/bpf/progs/test_tracepoint.c

···
 }
 
 char _license[] SEC("license") = "GPL";
-__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */

tools/testing/selftests/bpf/progs/test_tunnel_kern.c

···
 		bpf_trace_printk(fmt, sizeof(fmt), __LINE__, ret); \
 	} while (0)
 
-int _version SEC("version") = 1;
-
 struct geneve_opt {
 	__be16	opt_class;
 	__u8	type;

tools/testing/selftests/bpf/progs/test_xdp.c

···
 #include <bpf/bpf_endian.h>
 #include "test_iptunnel_common.h"
 
-int _version SEC("version") = 1;
-
 struct {
 	__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
 	__uint(max_entries, 256);

tools/testing/selftests/bpf/progs/test_xdp_loop.c

···
 #include <bpf/bpf_endian.h>
 #include "test_iptunnel_common.h"
 
-int _version SEC("version") = 1;
-
 struct {
 	__uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
 	__uint(max_entries, 256);

tools/testing/selftests/bpf/progs/test_xdp_redirect.c

···
 #include <linux/bpf.h>
 #include <bpf/bpf_helpers.h>
 
-int _version SEC("version") = 1;
-
 SEC("redirect_to_111")
 int xdp_redirect_to_111(struct xdp_md *xdp)
 {