Re: [PATCH v3 04/19] vhost/iotlb: add VHOST_IOTLB_UNLIMITED macro
From: Jason Wang <hidden>
Date: 2020-12-07 03:57:14
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lkml
On 2020/12/4 上午1:04, Stefano Garzarella wrote:
It's possible to allocate an unlimited IOTLB calling vhost_iotlb_alloc() with 'limit' = 0. Add a new macro (VHOST_IOTLB_UNLIMITED) for this case and document it in the vhost_iotlb_alloc() documentation block. Suggested-by: Jason Wang <redacted> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <redacted>
quoted hunk ↗ jump to hunk
--- include/linux/vhost_iotlb.h | 2 ++ drivers/vhost/iotlb.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletion(-)diff --git a/include/linux/vhost_iotlb.h b/include/linux/vhost_iotlb.h index 6b09b786a762..47019f97f795 100644 --- a/include/linux/vhost_iotlb.h +++ b/include/linux/vhost_iotlb.h@@ -4,6 +4,8 @@ #include <linux/interval_tree_generic.h> +#define VHOST_IOTLB_UNLIMITED 0 + struct vhost_iotlb_map { struct rb_node rb; struct list_head link;diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c index 0fd3f87e913c..80fdde78ee5a 100644 --- a/drivers/vhost/iotlb.c +++ b/drivers/vhost/iotlb.c@@ -100,7 +100,8 @@ EXPORT_SYMBOL_GPL(vhost_iotlb_del_range); /** * vhost_iotlb_alloc - add a new vhost IOTLB - * @limit: maximum number of IOTLB entries + * @limit: maximum number of IOTLB entries (use VHOST_IOTLB_UNLIMITED for an + * unlimited IOTLB) * @flags: VHOST_IOTLB_FLAG_XXX * * Returns an error is memory allocation fails
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