#define MNT_STRICTATIME 0x80
#define MNT_SHRINKABLE 0x100
-#define MNT_IMBALANCED_WRITE_COUNT 0x200 /* just for debugging */
+#define MNT_WRITE_HOLD 0x200
#define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */
#define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */
int mnt_expiry_mark; /* true if marked for expiry */
int mnt_pinned;
int mnt_ghosts;
- /*
- * This value is not stable unless all of the mnt_writers[] spinlocks
- * are held, and all mnt_writer[]s on this mount have 0 as their ->count
- */
- atomic_t __mnt_writers;
+#ifdef CONFIG_SMP
+ int *mnt_writers;
+#else
+ int mnt_writers;
+#endif
};
+static inline int *get_mnt_writers_ptr(struct vfsmount *mnt)
+{
+#ifdef CONFIG_SMP
+ return mnt->mnt_writers;
+#else
+ return &mnt->mnt_writers;
+#endif
+}
+
static inline struct vfsmount *mntget(struct vfsmount *mnt)
{
if (mnt)
return mnt;
}
+struct file; /* forward dec */
+
extern int mnt_want_write(struct vfsmount *mnt);
+extern int mnt_want_write_file(struct file *file);
+extern int mnt_clone_write(struct vfsmount *mnt);
extern void mnt_drop_write(struct vfsmount *mnt);
extern void mntput_no_expire(struct vfsmount *mnt);
extern void mnt_pin(struct vfsmount *mnt);