Merge tag 'x86-mm-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 mm update from Ingo Molnar:
 "Do not create the x86/init_pkru debugfs file if the CPU doesn't
  support PKRU"

* tag 'x86-mm-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/pkeys: Skip 'init_pkru' debugfs file creation when pkeys not supported

Author: torvalds

arch/x86/mm/pkeys.c

@@ -192,6 +192,10 @@ static const struct file_operations fops_init_pkru = {
 
 static int __init create_init_pkru_value(void)
 {
+	/* Do not expose the file if pkeys are not supported. */
+	if (!cpu_feature_enabled(X86_FEATURE_OSPKE))
+		return 0;
+
 	debugfs_create_file("init_pkru", S_IRUSR | S_IWUSR,
 			arch_debugfs_dir, NULL, &fops_init_pkru);
 	return 0;