Revert "tc: fix compilation with old gcc (< 4.6)"

This reverts commit 8f80d450.

tc/tc_bpf.c

@@ -257,14 +257,12 @@ static bool bpf_may_skip_map_creation(int file_fd)
 static int bpf_create_map(enum bpf_map_type type, unsigned int size_key,
 			  unsigned int size_value, unsigned int max_elem)
 {
-	union bpf_attr attr;
-
-	memset(&attr, 0, sizeof(attr));
-
-	attr.map_type = type;
-	attr.key_size = size_key;
-	attr.value_size = size_value;
-	attr.max_entries = max_elem;
+	union bpf_attr attr = {
+		.map_type	= type,
+		.key_size	= size_key,
+		.value_size	= size_value,
+		.max_entries	= max_elem,
+	};
 
 	return bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
 }
@@ -272,14 +270,12 @@ static int bpf_create_map(enum bpf_map_type type, unsigned int size_key,
 static int bpf_update_map(int fd, const void *key, const void *value,
 			  uint64_t flags)
 {
-	union bpf_attr attr;
-
-	memset(&attr, 0, sizeof(attr));
-
-	attr.map_fd = fd;
-	attr.key = bpf_ptr_to_u64(key);
-	attr.value = bpf_ptr_to_u64(value);
-	attr.flags = flags;
+	union bpf_attr attr = {
+		.map_fd		= fd,
+		.key		= bpf_ptr_to_u64(key),
+		.value		= bpf_ptr_to_u64(value),
+		.flags		= flags,
+	};
 
 	return bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));
 }
@@ -287,17 +283,15 @@ static int bpf_update_map(int fd, const void *key, const void *value,
 static int bpf_prog_load(enum bpf_prog_type type, const struct bpf_insn *insns,
 			 unsigned int len, const char *license)
 {
-	union bpf_attr attr;
-
-	memset(&attr, 0, sizeof(attr));
-
-	attr.prog_type = type;
-	attr.insns = bpf_ptr_to_u64(insns);
-	attr.insn_cnt = len / sizeof(struct bpf_insn);
-	attr.license = bpf_ptr_to_u64(license);
-	attr.log_buf = bpf_ptr_to_u64(bpf_log_buf);
-	attr.log_size = sizeof(bpf_log_buf);
-	attr.log_level = 1;
+	union bpf_attr attr = {
+		.prog_type	= type,
+		.insns		= bpf_ptr_to_u64(insns),
+		.insn_cnt	= len / sizeof(struct bpf_insn),
+		.license	= bpf_ptr_to_u64(license),
+		.log_buf	= bpf_ptr_to_u64(bpf_log_buf),
+		.log_size	= sizeof(bpf_log_buf),
+		.log_level	= 1,
+	};
 
 	return bpf(BPF_PROG_LOAD, &attr, sizeof(attr));
 }