powerpc/powernv/memtrace: Remove memtrace mmap()

	return simple_read_from_buffer(ubuf, count, ppos, ent->mem, ent->size);

}

static bool valid_memtrace_range(struct memtrace_entry *dev,

				 unsigned long start, unsigned long size)

{

	if ((start >= dev->start) &&

	    ((start + size) <= (dev->start + dev->size)))

		return true;

	return false;

}

static int memtrace_mmap(struct file *filp, struct vm_area_struct *vma)

{

	unsigned long size = vma->vm_end - vma->vm_start;

	struct memtrace_entry *dev = filp->private_data;

	if (!valid_memtrace_range(dev, vma->vm_pgoff << PAGE_SHIFT, size))

		return -EINVAL;

	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

	if (remap_pfn_range(vma, vma->vm_start,

			    vma->vm_pgoff + (dev->start >> PAGE_SHIFT),

			    size, vma->vm_page_prot))

		return -EAGAIN;

	return 0;

}

static const struct file_operations memtrace_fops = {

	.llseek = default_llseek,

	.read	= memtrace_read,

	.mmap	= memtrace_mmap,

	.open	= simple_open,

};