selftests/bpf: rename bpf_iter_task.c to bpf_iter_tasks.c

The newly-added struct bpf_iter_task has a name collision with a selftest
for the seq_file task iter's bpf skel, so the selftests/bpf/progs file is
renamed in order to avoid the collision.

Signed-off-by: Chuyi Zhou <[e-mail]>
Acked-by: Andrii Nakryiko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Alexei Starovoitov <[e-mail]>

tools/testing/selftests/bpf/prog_tests/bpf_iter.c

···
 #include "bpf_iter_ipv6_route.skel.h"
 #include "bpf_iter_netlink.skel.h"
 #include "bpf_iter_bpf_map.skel.h"
-#include "bpf_iter_task.skel.h"
+#include "bpf_iter_tasks.skel.h"
 #include "bpf_iter_task_stack.skel.h"
 #include "bpf_iter_task_file.skel.h"
 #include "bpf_iter_task_vmas.skel.h"
···
 static void test_task_common_nocheck(struct bpf_iter_attach_opts *opts,
 				     int *num_unknown, int *num_known)
 {
-	struct bpf_iter_task *skel;
+	struct bpf_iter_tasks *skel;
 	pthread_t thread_id;
 	void *ret;
 
-	skel = bpf_iter_task__open_and_load();
-	if (!ASSERT_OK_PTR(skel, "bpf_iter_task__open_and_load"))
+	skel = bpf_iter_tasks__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "bpf_iter_tasks__open_and_load"))
 		return;
 
 	ASSERT_OK(pthread_mutex_lock(&do_nothing_mutex), "pthread_mutex_lock");
···
 	ASSERT_FALSE(pthread_join(thread_id, &ret) || ret != NULL,
 		     "pthread_join");
 
-	bpf_iter_task__destroy(skel);
+	bpf_iter_tasks__destroy(skel);
 }
 
 static void test_task_common(struct bpf_iter_attach_opts *opts, int num_unknown, int num_known)
···
 
 static void test_task_sleepable(void)
 {
-	struct bpf_iter_task *skel;
+	struct bpf_iter_tasks *skel;
 
-	skel = bpf_iter_task__open_and_load();
-	if (!ASSERT_OK_PTR(skel, "bpf_iter_task__open_and_load"))
+	skel = bpf_iter_tasks__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "bpf_iter_tasks__open_and_load"))
 		return;
 
 	do_dummy_read(skel->progs.dump_task_sleepable);
···
 	ASSERT_GT(skel->bss->num_success_copy_from_user_task, 0,
 		  "num_success_copy_from_user_task");
 
-	bpf_iter_task__destroy(skel);
+	bpf_iter_tasks__destroy(skel);
 }
 
 static void test_task_stack(void)