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Subject[PATCH 2/5] uio: Kill unused vma_count.

Remove the tracking of how many vmas are using in the uio memory
mapping mode. The uio code doesn't use that information anywhere.

Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
---
drivers/uio/uio.c | 16 ----------------
1 files changed, 0 insertions(+), 16 deletions(-)
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 565559c..95f25ae 100644
--- 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;
@@ -599,18 +598,6 @@ 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;
@@ -638,8 +625,6 @@ static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
}

static const struct vm_operations_struct uio_vm_ops = {
- .open = uio_vma_open,
- .close = uio_vma_close,
.fault = uio_vma_fault,
};

@@ -665,7 +650,6 @@ static int uio_mmap_logical(struct vm_area_struct *vma)
{
vma->vm_flags |= VM_RESERVED;
vma->vm_ops = &uio_vm_ops;
- uio_vma_open(vma);
return 0;
}

--
1.7.2.2


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