samples/bpf: syscall_tp_user: Rename num_progs into nr_tests

The variable name num_progs causes confusion because that variable
really controls the number of rounds the test should be executed.

Rename num_progs into nr_tests for the sake of clarity.
Signed-off-by: Jinghao Jia <jinghao@linux.ibm.com>
Signed-off-by: Ruowen Qin <ruowenq2@illinois.edu>
Signed-off-by: Jinghao Jia <jinghao7@illinois.edu>
Link: https://lore.kernel.org/r/20230917214220.637721-3-jinghao7@illinois.eduSigned-off-by: Alexei Starovoitov <ast@kernel.org>

samples/bpf/syscall_tp_user.c

@@ -17,8 +17,8 @@
 
 static void usage(const char *cmd)
 {
-	printf("USAGE: %s [-i num_progs] [-h]\n", cmd);
-	printf("       -i num_progs      # number of progs of the test\n");
+	printf("USAGE: %s [-i nr_tests] [-h]\n", cmd);
+	printf("       -i nr_tests      # rounds of test to run\n");
 	printf("       -h               # help\n");
 }
 
@@ -45,14 +45,14 @@ static void verify_map(int map_id)
 	}
 }
 
-static int test(char *filename, int num_progs)
+static int test(char *filename, int nr_tests)
 {
-	int map0_fds[num_progs], map1_fds[num_progs], fd, i, j = 0;
-	struct bpf_link *links[num_progs * 4];
-	struct bpf_object *objs[num_progs];
+	int map0_fds[nr_tests], map1_fds[nr_tests], fd, i, j = 0;
+	struct bpf_link *links[nr_tests * 4];
+	struct bpf_object *objs[nr_tests];
 	struct bpf_program *prog;
 
-	for (i = 0; i < num_progs; i++) {
+	for (i = 0; i < nr_tests; i++) {
 		objs[i] = bpf_object__open_file(filename, NULL);
 		if (libbpf_get_error(objs[i])) {
 			fprintf(stderr, "opening BPF object file failed\n");
@@ -101,7 +101,7 @@ static int test(char *filename, int num_progs)
 	close(fd);
 
 	/* verify the map */
-	for (i = 0; i < num_progs; i++) {
+	for (i = 0; i < nr_tests; i++) {
 		verify_map(map0_fds[i]);
 		verify_map(map1_fds[i]);
 	}
@@ -117,13 +117,13 @@ static int test(char *filename, int num_progs)
 
 int main(int argc, char **argv)
 {
-	int opt, num_progs = 1;
+	int opt, nr_tests = 1;
 	char filename[256];
 
 	while ((opt = getopt(argc, argv, "i:h")) != -1) {
 		switch (opt) {
 		case 'i':
-			num_progs = atoi(optarg);
+			nr_tests = atoi(optarg);
 			break;
 		case 'h':
 		default:
@@ -134,5 +134,5 @@ int main(int argc, char **argv)
 
 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
 
-	return test(filename, num_progs);
+	return test(filename, nr_tests);
 }