netdev - [RFC net-next 02/22] xdp: initialize xdp_buff mb bit to 0 in netif_receive_generic

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Message-Id: <0c3c29b8d87259cd54bb7b1ec5892f71d12d62bb.1595503780.git.lorenzo@kernel.org>
Date:   Thu, 23 Jul 2020 13:42:14 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     netdev@...r.kernel.org
Cc:     bpf@...r.kernel.org, davem@...emloft.net, ast@...nel.org,
        brouer@...hat.com, daniel@...earbox.net,
        lorenzo.bianconi@...hat.com, echaudro@...hat.com,
        sameehj@...zon.com, kuba@...nel.org
Subject: [RFC net-next 02/22] xdp: initialize xdp_buff mb bit to 0 in netif_receive_generic_xdp

Initialize multi-buffer bit (mb) to 0 in xdp_buff data structure.
This is a preliminary patch to enable xdp multi-buffer support.

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 net/core/dev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/core/dev.c b/net/core/dev.c
index 316349f6cea5..eb3e54df198c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4641,6 +4641,7 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb,
 	/* SKB "head" area always have tailroom for skb_shared_info */
 	xdp->frame_sz  = (void *)skb_end_pointer(skb) - xdp->data_hard_start;
 	xdp->frame_sz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+	xdp->mb = 0;
 
 	orig_data_end = xdp->data_end;
 	orig_data = xdp->data;
-- 
2.26.2