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uio: drop unused vma_count member in uio_device struct

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vma_count is used write-only and so fails to be useful. So remove it.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König 2013-08-07 13:02:54 +02:00 committed by Greg Kroah-Hartman
parent 7294151d05
commit b65c4014ef
1 changed files with 0 additions and 16 deletions
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16
drivers/uio/uio.c
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@ -35,7 +35,6 @@ struct uio_device {
atomic_t event;
struct fasync_struct *async_queue;
wait_queue_head_t wait;
int vma_count;
struct uio_info *info;
struct kobject *map_dir;
struct kobject *portio_dir;
@ -593,18 +592,6 @@ static int uio_find_mem_index(struct vm_area_struct *vma)
return -1;
}
static void uio_vma_open(struct vm_area_struct *vma)
{
struct uio_device *idev = vma->vm_private_data;
idev->vma_count++;
}
static void uio_vma_close(struct vm_area_struct *vma)
{
struct uio_device *idev = vma->vm_private_data;
idev->vma_count--;
}
static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct uio_device *idev = vma->vm_private_data;
@ -631,8 +618,6 @@ static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
}
static const struct vm_operations_struct uio_logical_vm_ops = {
.open = uio_vma_open,
.close = uio_vma_close,
.fault = uio_vma_fault,
};
@ -640,7 +625,6 @@ static int uio_mmap_logical(struct vm_area_struct *vma)
{
vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
vma->vm_ops = &uio_logical_vm_ops;
uio_vma_open(vma);
return 0;
}