bpf: Remove bpf_sys.h from selftests

Add require dependency headers.

Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/lib/bpf/bpf.c

@@ -50,7 +50,13 @@ static __u64 ptr_to_u64(const void *ptr)
 static int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr,
 		   unsigned int size)
 {
+#ifdef __NR_bpf
 	return syscall(__NR_bpf, cmd, attr, size);
+#else
+	fprintf(stderr, "No bpf syscall, kernel headers too old?\n");
+	errno = ENOSYS;
+	return -1;
+#endif
 }
 
 int bpf_create_map(enum bpf_map_type map_type, int key_size,

tools/testing/selftests/bpf/test_lpm_map.c

@@ -23,7 +23,6 @@
 #include <sys/resource.h>
 
 #include <bpf/bpf.h>
-#include "bpf_sys.h"
 #include "bpf_util.h"
 
 struct tlpm_node {

tools/testing/selftests/bpf/test_lru_map.c

@@ -19,7 +19,6 @@
 #include <sys/resource.h>
 
 #include <bpf/bpf.h>
-#include "bpf_sys.h"
 #include "bpf_util.h"
 
 #define LOCAL_FREE_TARGET	(128)

tools/testing/selftests/bpf/test_maps.c

@@ -22,7 +22,6 @@
 #include <linux/bpf.h>
 
 #include <bpf/bpf.h>
-#include "bpf_sys.h"
 #include "bpf_util.h"
 
 static int map_flags;

tools/testing/selftests/bpf/test_tag.c

@@ -1,3 +1,4 @@
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
@@ -20,8 +21,6 @@
 
 #include "../../../include/linux/filter.h"
 
-#include "bpf_sys.h"
-
 static struct bpf_insn prog[BPF_MAXINSNS];
 
 static void bpf_gen_imm_prog(unsigned int insns, int fd_map)

tools/testing/selftests/bpf/test_verifier.c

@@ -8,7 +8,9 @@
  * License as published by the Free Software Foundation.
  */
 
+#include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 #include <errno.h>
 #include <string.h>
@@ -28,8 +30,6 @@
 
 #include "../../../include/linux/filter.h"
 
-#include "bpf_sys.h"
-
 #ifndef ARRAY_SIZE
 # define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 #endif