kcov: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: "Steven Rostedt (VMware)" <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Anders Roxell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
(cherry picked from commit ec9672d)

Orabug: 29558684

Signed-off-by: George Kennedy <[email protected]>
Reviewed-by: John Donnelly <[email protected]>

Author: gregkh

kernel/kcov.c

@@ -446,10 +446,8 @@ static int __init kcov_init(void)
 	 * there is no need to protect it against removal races. The
 	 * use of debugfs_create_file_unsafe() is actually safe here.
 	 */
-	if (!debugfs_create_file_unsafe("kcov", 0600, NULL, NULL, &kcov_fops)) {
-		pr_err("failed to create kcov in debugfs\n");
-		return -ENOMEM;
-	}
+	debugfs_create_file_unsafe("kcov", 0600, NULL, NULL, &kcov_fops);
+
 	return 0;
 }