fault-injection: use debugfs_remove_recursive

Use debugfs_remove_recursive() to simplify initialization and
deinitialization of fault injection debugfs files.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index 7b72328..a842db6 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -27,23 +27,7 @@
 	unsigned long count;
 
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-
-	struct {
-		struct dentry *dir;
-
-		struct dentry *probability_file;
-		struct dentry *interval_file;
-		struct dentry *times_file;
-		struct dentry *space_file;
-		struct dentry *verbose_file;
-		struct dentry *task_filter_file;
-		struct dentry *stacktrace_depth_file;
-		struct dentry *require_start_file;
-		struct dentry *require_end_file;
-		struct dentry *reject_start_file;
-		struct dentry *reject_end_file;
-	} dentries;
-
+	struct dentry *dir;
 #endif
 };