AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

USB: mon nopage

Browse Source 
Convert USB mon driver from nopage to fault.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Nick Piggin 2007-12-13 16:15:35 -08:00 committed by Greg Kroah-Hartman
parent d0fab0ddf3
commit 041509db39
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/usb/mon/mon_bin.c
View File

@ -1047,33 +1047,31 @@ static void mon_bin_vma_close(struct vm_area_struct *vma)
/*
* 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;