Commit b65c4014 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Greg Kroah-Hartman
Browse files

uio: drop unused vma_count member in uio_device struct 



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

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7294151d

drivers/uio/uio.c

+0 −16
Original line number Diff line number Diff line
@@ -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;

}