[PATCH 1/9 v8] fs_pin: Initialize value for fs_pin explicitly

[Kinglong Mee <kinglongmee@gmail.com>]

Without initialized, done in fs_pin at stack space may
contains strange value.

v8, same as v3
Adds macro for header file

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
 include/linux/fs_pin.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/fs_pin.h b/include/linux/fs_pin.h
index 3886b3b..0dde7b7 100644
--- a/include/linux/fs_pin.h
+++ b/include/linux/fs_pin.h
@@ -1,3 +1,6 @@
+#ifndef _LINUX_FS_PIN_H
+#define _LINUX_FS_PIN_H
+
 #include <linux/wait.h>
 
 struct fs_pin {
@@ -16,9 +19,12 @@ static inline void init_fs_pin(struct fs_pin *p, void (*kill)(struct fs_pin *))
 	INIT_HLIST_NODE(&p->s_list);
 	INIT_HLIST_NODE(&p->m_list);
 	p->kill = kill;
+	p->done = 0;
 }
 
 void pin_remove(struct fs_pin *);
 void pin_insert_group(struct fs_pin *, struct vfsmount *, struct hlist_head *);
 void pin_insert(struct fs_pin *, struct vfsmount *);
 void pin_kill(struct fs_pin *);
+
+#endif
-- 
2.4.3