selftests/bpf: Prepare to add -Wsign-compare for bpf tests

-Change only variable types for correct sign comparisons

Signed-off-by: Mehdi Ben Hadj Khelifa <[email protected]>

Author: Mehdibenhadjkhelifa

tools/testing/selftests/bpf/progs/test_global_func11.c

@@ -5,7 +5,7 @@
 #include "bpf_misc.h"
 
 struct S {
-	int x;
+	__u32 x;
 };
 
 __noinline int foo(const struct S *s)

tools/testing/selftests/bpf/progs/test_global_func12.c

@@ -5,7 +5,7 @@
 #include "bpf_misc.h"
 
 struct S {
-	int x;
+	__u32 x;
 };
 
 __noinline int foo(const struct S *s)

tools/testing/selftests/bpf/progs/test_global_func13.c

@@ -5,7 +5,7 @@
 #include "bpf_misc.h"
 
 struct S {
-	int x;
+	__u32 x;
 };
 
 __noinline int foo(const struct S *s)

tools/testing/selftests/bpf/progs/test_global_func9.c

@@ -5,7 +5,7 @@
 #include "bpf_misc.h"
 
 struct S {
-	int x;
+	__u32 x;
 };
 
 struct C {

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

@@ -22,7 +22,7 @@ int sysenter_getpgid(const void *ctx)
 	/* Just do it for once, when called from our own test prog. This
 	 * ensures the map value is only updated for a single CPU.
 	 */
-	int cur_pid = bpf_get_current_pid_tgid() >> 32;
+	__u32 cur_pid = bpf_get_current_pid_tgid() >> 32;
 
 	if (cur_pid == inPid)
 		bpf_map_update_elem(&hashmap1, &inKey, &inValue, BPF_NOEXIST);

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

@@ -102,7 +102,7 @@ int xdp_ingress_v6(struct xdp_md *xdp)
 	opt_state.byte_offset = sizeof(struct tcphdr) + tcp_offset;
 
 	/* max number of bytes of options in tcp header is 40 bytes */
-	for (int i = 0; i < tcp_hdr_opt_max_opt_checks; i++) {
+	for (__u32 i = 0; i < tcp_hdr_opt_max_opt_checks; i++) {
 		err = parse_hdr_opt(xdp, &opt_state);
 
 		if (err || !opt_state.hdr_bytes_remaining)