[patch 8/8] usb: mon nopage

[a***@linux-foundation.org]

From: Nick Piggin <***@suse.de>

Convert USB mon driver from nopage to fault.

Signed-off-by: Nick Piggin <***@suse.de>
Acked-by: Pete Zaitcev <***@redhat.com>
Cc: Greg KH <***@kroah.com>
Signed-off-by: Andrew Morton <***@linux-foundation.org>
---

drivers/usb/mon/mon_bin.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)

diff -puN drivers/usb/mon/mon_bin.c~usb-mon-nopage drivers/usb/mon/mon_bin.c
--- a/drivers/usb/mon/mon_bin.c~usb-mon-nopage
+++ a/drivers/usb/mon/mon_bin.c
@@ -1047,33 +1047,31 @@ static void mon_bin_vma_close(struct vm_
/*
* Map ring pages to user space.
*/
-struct page *mon_bin_vma_nopage(struct vm_area_struct *vma,
- unsigned long address, int *type)
+static int mon_bin_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct mon_reader_bin *rp = vma->vm_private_data;
unsigned long offset, chunk_idx;
struct page *pageptr;

- offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
+ offset = vmf->pgoff << PAGE_SHIFT;
if (offset >= rp->b_size)
- return NOPAGE_SIGBUS;
+ return VM_FAULT_SIGBUS;
chunk_idx = offset / CHUNK_SIZE;
pageptr = rp->b_vec[chunk_idx].pg;
get_page(pageptr);
- if (type)
- *type = VM_FAULT_MINOR;
- return pageptr;
+ vmf->page = pageptr;
+ return 0;
}

struct vm_operations_struct mon_bin_vm_ops = {
.open = mon_bin_vma_open,
.close = mon_bin_vma_close,
- .nopage = mon_bin_vma_nopage,
+ .fault = mon_bin_vma_fault,
};

int mon_bin_mmap(struct file *filp, struct vm_area_struct *vma)
{
- /* don't do anything here: "nopage" will set up page table entries */
+ /* don't do anything here: "fault" will set up page table entries */
vma->vm_ops = &mon_bin_vm_ops;
vma->vm_flags |= VM_RESERVED;
vma->vm_private_data = filp->private_data;
_

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