[PATCH v5 4/5] drm: Add library for shmem backed GEM objects

[Eric Anholt]

Noralf Trønnes <noralf at tronnes.org> writes:
> +static void drm_gem_shmem_vm_close(struct vm_area_struct *vma)
> +{
> +	struct drm_gem_object *obj = vma->vm_private_data;
> +	struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj);
> +
> +	drm_gem_shmem_put_pages(shmem);
> +	drm_gem_vm_close(vma);
> +}
> +
> +const struct vm_operations_struct drm_gem_shmem_vm_ops = {
> +	.fault = drm_gem_shmem_fault,
> +	.open = drm_gem_vm_open,
> +	.close = drm_gem_shmem_vm_close,
> +};
> +EXPORT_SYMBOL_GPL(drm_gem_shmem_vm_ops);

I just saw a warning from drm_gem_shmem_put_pages() for
!shmem->pages_use_count -- I think drm_gem_vm_open() needs to
drm_gem_shmem_get_pages().
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