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: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index c4279b2234aca3532e92efdea28cc2d6d013f168..8abe78c0b16ff386e6aabf5b06d31e941fabe868 100644 (file)
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -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;
 }