[PATCH] kselftests: fix ptr_ret.cocci warnings

[kbuild test robot]

From: kbuild test robot <fengguang.wu@xxxxxxxxx>

lib/test_atomic_sections.c:66:1-3: WARNING: PTR_ERR_OR_ZERO can be used


 Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

Fixes: 3b0e47f0ade1 ("kselftests: Add tests for the preemptoff and irqsoff tracers")
CC: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
---

 test_atomic_sections.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/lib/test_atomic_sections.c
+++ b/lib/test_atomic_sections.c
@@ -63,10 +63,7 @@ static int __init atomic_sect_init(void)
 	snprintf(task_name, 50, "%s dis test", atomic_mode);
 
 	test_task = kthread_run((void*)atomic_sect_run, NULL, task_name);
-	if (IS_ERR(test_task))
-		return PTR_ERR(test_task);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(test_task);
 }
 
 static void __exit atomic_sect_exit(void)