int pcc_fsync(struct file *file, loff_t start, loff_t end,
int datasync, bool *cached);
int pcc_file_mmap(struct file *file, struct vm_area_struct *vma, bool *cached);
int pcc_fsync(struct file *file, loff_t start, loff_t end,
int datasync, bool *cached);
int pcc_file_mmap(struct file *file, struct vm_area_struct *vma, bool *cached);