powerpc/powernv/memtrace: Remove memtrace mmap()

debugfs doesn't support mmap(), so this code is never used.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c
index b99283d..f731011 100644 (file)
--- a/arch/powerpc/platforms/powernv/memtrace.c
+++ b/arch/powerpc/platforms/powernv/memtrace.c
@@ -47,38 +47,9 @@ static ssize_t memtrace_read(struct file *filp, char __user *ubuf,
        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,
 };