Re: [PATCH 07/11] vhost: convert vhost_umem_interval_tree to half closed intervals

[Michel Lespinasse]

On Thu, Oct 03, 2019 at 01:18:54PM -0700, Davidlohr Bueso wrote:
> @@ -1320,15 +1320,14 @@ static bool iotlb_access_ok(struct vhost_virtqueue *vq,
>  {
>  	const struct vhost_umem_node *node;
>  	struct vhost_umem *umem = vq->iotlb;
> -	u64 s = 0, size, orig_addr = addr, last = addr + len - 1;
> +	u64 s = 0, size, orig_addr = addr, last = addr + len;

maybe "end" or "end_addr" instead of "last".

> diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
> index e9ed2722b633..bb36cb9ed5ec 100644
> --- a/drivers/vhost/vhost.h
> +++ b/drivers/vhost/vhost.h
> @@ -53,13 +53,13 @@ struct vhost_log {
>  };
>  
>  #define START(node) ((node)->start)
> -#define LAST(node) ((node)->last)
> +#define END(node) ((node)->end)
>  
>  struct vhost_umem_node {
>  	struct rb_node rb;
>  	struct list_head link;
>  	__u64 start;
> -	__u64 last;
> +	__u64 end;
>  	__u64 size;
>  	__u64 userspace_addr;
>  	__u32 perm;

Preferably also rename __subtree_last to __subtree_end

Looks good to me otherwise.

-- 
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.