flush_ptrace_access
flush_ptrace_access(vma, page, uaddr, dst, len);
flush_ptrace_access(vma, (unsigned long)dst, (unsigned long)dst + len);
void flush_ptrace_access(struct vm_area_struct *, struct page *,
flush_ptrace_access(vma, page, vaddr, src, len, 0); \
flush_ptrace_access(vma, page, vaddr, dst, len, 1); \
EXPORT_SYMBOL_GPL(flush_ptrace_access);