vfs_cancel_lock   707 fs/lockd/svclock.c 		vfs_cancel_lock(block->b_file->f_file,
vfs_cancel_lock  2810 fs/locks.c     EXPORT_SYMBOL_GPL(vfs_cancel_lock);
vfs_cancel_lock  1165 include/linux/fs.h extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl);