netdev - [PATCH 03/12 v2 RFC] skbuff: simplify sock_zerocopy

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Date:   Mon, 21 Dec 2020 16:09:17 -0800
From:   Jonathan Lemon <jonathan.lemon@...il.com>
To:     <netdev@...r.kernel.org>, <edumazet@...gle.com>,
        <willemdebruijn.kernel@...il.com>
CC:     <kernel-team@...com>
Subject: [PATCH 03/12 v2 RFC] skbuff: simplify sock_zerocopy_put

From: Jonathan Lemon <bsd@...com>

All 'struct ubuf_info' users should have a callback defined.
Remove the dead code path to consume_skb(), which makes
unwarranted assumptions about how the structure was allocated.

Signed-off-by: Jonathan Lemon <jonathan.lemon@...il.com>
---
 net/core/skbuff.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 327ee8938f78..ea32b3414ad6 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1245,12 +1245,8 @@ EXPORT_SYMBOL_GPL(sock_zerocopy_callback);
 
 void sock_zerocopy_put(struct ubuf_info *uarg)
 {
-	if (uarg && refcount_dec_and_test(&uarg->refcnt)) {
-		if (uarg->callback)
-			uarg->callback(uarg, uarg->zerocopy);
-		else
-			consume_skb(skb_from_uarg(uarg));
-	}
+	if (uarg && refcount_dec_and_test(&uarg->refcnt))
+		uarg->callback(uarg, uarg->zerocopy);
 }
 EXPORT_SYMBOL_GPL(sock_zerocopy_put);
 
-- 
2.24.1